concepts: field horse mallet player ride
target: A polo player rides a horse on the field and hits the ball with a mallet.
references: A polo player rides a horse on the field and hits the ball with a mallet. At the polo field, a polo player was riding a horse and using a mallet. A man rides a horse through a field with a mallet, he was a polo player Polo players on horses ride across the field with their mallets.