Simplify the following text for a Grade 8 native English-speaking person.
Original: Jikji was published in Heungdeok Temple in 1377 , 78 years prior to Johannes Gutenberg 's acclaimed `` 42-Line Bible '' printed during the years 1452-1455 .
Simplified: Jikji was published 78 years before Johannes Gutenberg 's `` 42-Line Bible '' .