Complex sentence: Over the course of his 40-year sculpting career Moigniez exhibited thirty works at the Salon between 1855--92, the first of which was his plaster, "Pointer Stopping at a Pheasant", at the Exposition Universelle of 1855.
Split into simpler sentences: Over the course of his 40-year sculpting career Moigniez exhibited thirty works at the Salon between 1855--92. His first submission in a major art exhibition was his plaster, "Pointer Stopping at a Pheasant", at the Exposition Universelle of 1855.