Complex sentence: René Just Haüy (February 28,1743--June 3,1822), French mineralogist, commonly styled the Abbé Haüy, from being an honorary canon of Notre Dame, was born at St Just, in the "départment" of Oise.
Split into simpler sentences: René Just Haüy (February 28,1743--June 3,1822) was a French mineralogist, commonly styled the Abbé Haüy, from being an honorary canon of Notre Dame. He was born at St Just, in the "département" of Oise.