Leo: Given the sentence "A third baseman is chasing a base runner back to second base." is it true that "The third baseman fell and broke his leg when he was trying to get a runner out at second."?
Mei: OK, So, let's think first...
Me:
If a third basemen is chasing a runner is does not follow that he fell and broke his leg. Most baseball plays do not involve injuries. A player chasing a runner back to second is not necessarily trying to get a runner out. The goal of chasing a base runner can be simply to get the runner to return to second base.
Thus, the answer is it is not possible to tell.