event_frame('thomas edison', 'light bulb', '1879', 'menlo park new jersey').
event_frame('william shockley','transistor','1947','murray hill new jersey').
event_frame('jack kilby','integrated circuit','1958','dallas texas').
event_frame('orville wright','airplane','1903','kitty hawk north carolina').
event_frame('ernst alexanderson','alternator','1906','brant rock massachusetts').
event_frame('wilbur wright','airplane','1903','kitty hawk north carolina').
event_frame('steve wozniak','personal computer','1976','los altos california').
event_frame('marcian hoff','microprocessor','1969','santa clara california').
event_frame('eli whitney','cotton gin','1974','westboro massachusetts').
event_frame('george stibitz','digital computer','1939','new york city').
event_frame('gordon gould','laser','1957','new york city').
event_frame('elisha otis','elevator','1852','yonkers new york').
event_frame('igor sigorsky','helicopter','1913','russia').
event_frame('emile berliner','microphone','1876','washington').
event_frame('thomas edison','phonograph','1877','menlo park new jersey').
event_frame('roy plunkett','teflon','1938','deepwater new jersey').
event_frame('guglielmo marconi','telegraph','1901','poldhu england').
event_frame('alexander graham bell','telephone','1876','london england').
event_frame('philo farnsworth','television','1926','san fransisco california').
event_frame('steve jobs','personal computer','1976','los altos california').