text,label
"Steam locomotives powered long-distance travel and telegraphs connected cities.",pre-1900
"Factories expanded during the Industrial Revolution, increasing urban migration.",pre-1900
"Horse-drawn carriages dominated transportation in major cities.",pre-1900
"Electric streetlights began replacing gas lamps in major European cities.",pre-1900
"Typewriters became common in offices toward the late 1800s.",pre-1900
"Steamships transformed global trade routes before the turn of the century.",pre-1900
"Gold rush migrations shaped economic expansion in the late 1800s.",pre-1900
"Railroads expanded rapidly, linking rural areas with industrial centers.",pre-1900
"Newspapers were the main source of mass communication in the 19th century.",pre-1900
"Early photography emerged with long exposure times and fragile plates.",pre-1900

"World War I trench warfare defined combat in the early 20th century.",1900-1945
"The Great Depression caused unemployment and economic collapse globally.",1900-1945
"Radio broadcasts became the dominant medium for entertainment and news.",1900-1945
"Prohibition in the U.S. led to speakeasies and bootlegging culture.",1900-1945
"Women entered factories during World War II as part of the wartime workforce.",1900-1945
"The Manhattan Project developed the first atomic weapons during WWII.",1900-1945
"Ration books were required for food and supplies during wartime shortages.",1900-1945
"Silent films transitioned into talkies as Hollywood expanded.",1900-1945
"Transatlantic flight became possible with early aviation breakthroughs.",1900-1945
"Art movements like Surrealism and Cubism reshaped global culture.",1900-1945

"The space race accelerated with the launch of Sputnik and later Apollo missions.",1946-1979
"The Cold War led to nuclear tension between the U.S. and the Soviet Union.",1946-1979
"Civil rights protests swept across the United States demanding equal rights.",1946-1979
"The Vietnam War dominated American foreign policy and public debate.",1946-1979
"Television became the primary source of home entertainment worldwide.",1946-1979
"Disco music and bell-bottom pants became iconic cultural symbols.",1946-1979
"The first microprocessors signaled the beginning of modern computing.",1946-1979
"Post-war suburbs expanded rapidly with affordable housing.",1946-1979
"Rock and roll music transformed youth culture globally.",1946-1979
"Environmental movements grew after major oil spills and pollution crises.",1946-1979

"Personal computers like the Commodore 64 and Apple II entered households.",1980-1999
"MTV launched and revolutionized music culture with music videos.",1980-1999
"Berlin Wall fell in 1989, marking the end of the Cold War era.",1980-1999
"VHS tapes became the primary way people watched movies at home.",1980-1999
"Grunge bands like Nirvana shaped 1990s alternative rock culture.",1980-1999
"The rise of the internet began connecting universities and early home users.",1980-1999
"Arcade games and early Nintendo consoles defined youth entertainment.",1980-1999
"Cell phones became more common but were large and limited in capability.",1980-1999
"Beepers and pagers were common communication tools before smartphones.",1980-1999
"Blockbuster stores were popular destinations for renting movies.",1980-1999

"The early 2000s saw MySpace and early Facebook shaping social networking.",2000-2015
"Smartphones became mainstream after the release of the iPhone in 2007.",2000-2015
"Streaming services began replacing DVDs for home entertainment.",2000-2015
"The 2008 financial crisis led to global economic recession.",2000-2015
"GPS navigation devices replaced paper maps for most drivers.",2000-2015
"Harry Potter books and movies dominated global pop culture.",2000-2015
"Digital cameras replaced film cameras for personal photography.",2000-2015
"MP3 players like the iPod changed how people listened to music.",2000-2015
"Cloud computing services like AWS rose in popularity.",2000-2015
"Early YouTube creators pioneered online video content.",2000-2015

"Schools went remote during COVID and classes moved to Zoom.",2016-present
"Lockdowns and mask mandates defined the early 2020 pandemic response.",2016-present
"Electric vehicles and renewable energy technologies expanded rapidly.",2016-present
"Short-form video platforms like TikTok dominated youth culture.",2016-present
"Cryptocurrency and NFTs surged in popularity before major crashes.",2016-present
"AI chatbots and generative AI tools became widely accessible.",2016-present
"Political polarization increased due to social media algorithms.",2016-present
"Remote work became common across tech and corporate industries.",2016-present
"5G networks rolled out across major cities worldwide.",2016-present
"Streaming services replaced traditional cable TV for many households.",2016-present