Complex sentence: A major aim Prof. Abdus Salam had in his mind when he made his original proposal to PAEC in 1974 that Nathiagali Summer College would evolve into a full fledged Centre for physics on the pattern of ICTP.
Split into simpler sentences: A major aim Prof. Abdus Salam had in his mind when he made his original proposal to PAEC in 1974. He hoped that Nathiagali Summer College would evolve into a full fledged Centre for physics on the pattern of ICTP.