Celtics’ Hometown Museum Too Scared to Bet Painting

On Tyler Green's urging, LACMA has made an apparently unilateral bet with Boston's Museum of Fine Arts: If the Celtics beat the Lakers, LACMA will lend Millard Sheets' Angels Flight to Boston for six weeks. This raises two questions: Why isn't Boston MFA putting up a painting? Does anyone in Boston know who Millard Sheets is?