Complex sentence: Jean-Marie Leclair (Lyon May 10,1697-Paris October 22,1764) was a Baroque composer who studied the violin in Turin and returned to Paris in 1723, where he played at the Concerts Spirituelles, the main semi-public music series.
Split into simpler sentences: Jean-Marie Leclair (Lyon May 10,1697-Paris October 22,1764) was a Baroque violinist and composer. Leclair had returned to Paris in 1723, where he played at the Concerts Spirituelles, the main semi-public music series.