Tagging Up in Baseball - Solution
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The third base runner leaves the base at E which is after F so he
has not committed a foul in the umpire frame.
The third base runner leaves the base at E which is before D so he
has committed at foul in the left fielder frame.
The umpire sees the third base runner leaving the base H, while
he sees the ball being caught at G. H is before G so
he will call a foul.