Complex sentence: In this, President John F. Kennedy survived the assassination attempt in 1963 and in his terms of office and that of the other Kennedys, the advancement of technology was concentrated on and billions of dollars poured into it instead of the space race.
Split into simpler sentences: In this, President John F. Kennedy survived the assassination attempt in 1963. During his terms of office and that of the other Kennedys, efforts concentrated on the advancement of technology instead of on the space race.