How many years did Willie Mays hit less than 20 home runs from his rookie year in 1951 to retirement in 1973?
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Willie Mays played baseball.
The sport of baseball is played by Willie Mays .
How many years did Willie Mays hit less than 20 home runs from his rookie year in 1951 to retirement in 1973?</s>Willie Mays played [unused1]baseball                [unused2] .
How many years did Willie Mays hit less than 20 home runs from his rookie year in 1951 to retirement in 1973?</s>Willie Mays played baseball.
How many years did Willie Mays hit less than 20 home runs from his rookie year in 1951 to retirement in 1973?</s>The sport of [unused1]baseball                [unused2] is played by Willie Mays .
How many years did Willie Mays hit less than 20 home runs from his rookie year in 1951 to retirement in 1973?</s>The sport of baseball is played by Willie Mays .
How many years did Willie Mays hit less than 20 home runs from his rookie year in 1951 to retirement in 1973?</s>[unused1]baseball[unused2],0,[unused1]baseball[unused2],[unused1]baseball[unused2],0,Willie Mays,Willie Mays,sport,[unused1]baseball[unused2],Willie Mays,0,Willie Mays
How many years did Willie Mays hit less than 20 home runs from his rookie year in 1951 to retirement in 1973?</s>baseball,0,baseball,baseball,0,Willie Mays,Willie Mays,sport,baseball,Willie Mays,0,Willie Mays