Original sentence: While at BU, he studied poetry with Robert Lowell, who quickly persuaded him that he had no future in that field, and turned to studing prose with Gerald Warner Brace, who encouraged him to write fiction
Edited sentence: While at BU, he studied poetry with Robert Lowell, who quickly persuaded him that he had no future in that field, and turned to studying prose with Gerald Warner Brace, who encouraged him to write fiction