Complex sentence: Isaac Newton Seligman was an American banker and communal worker; born in New York July 10,1855; educated at Columbia Grammar School and Columbia College, from which he graduated in 1876.
Split into simpler sentences: Isaac Newton Seligman (born in New York July 10,1855) was an American banker and communal worker. He attended Columbia Grammar School and Columbia College, from which he graduated in 1876.