Gregory Amenoff (born 1948) is an American painter. He is located in the tradition of the early American Modernist painters Georgia O'Keeffe, Charles Burchfield, Milton Avery, Arthur Dove and Marsden Hartley. In the early 80s his work was often associated with a style of painting called organic abstraction and exhibited alongside artists Bill Jensen, Katherine Porter and Terry Winters.
Gregory Amenoff played baseball.
The context was in regards to Gregory Amenoff being an American painter.  It did not say anything about him being a baseball player; from the context given we do not know if he did or did not every play baseball.  The system could have been confused if it has access to more knowledge on the subject than given in the context.
( z1 play :ARG0 ( z2 person :name ( z3 name :op "Gregory" :op "Amenoff" ) ) :ARG1 ( z4 baseball ) )