Complex sentence: When the first incarnation Animals reformed in 1968,1977 and 1983, Price not Rowberry was involved, and when a second keyboardist was added to the latter project, it was Money not Rowberry.
Split into simpler sentences: When the first incarnation Animals reformed in 1977, only Price and not Rowberry was involved. When a second keyboardist was added to the original group's second reunion in 1983, it was Money and not Rowberry.