Student: Given the sentence "A tennis player moving to hit the oncoming tennis ball." is it true that "Someone playing tennis."?.
Teacher: Let's think:

A tennis player moving to hit tennis ball is the same as someone is playing tennis. So the final answer is yes.
Student: Given the sentence "A tennis player moving to hit the oncoming tennis ball." is it true that "Someone playing tennis."?.
Teacher: Let's think:

user
A tennis player moving to hit tennis ball is the same as someone is playing tennis. So the final answer is yes.
assistant
Student: Given the sentence "A tennis player moving to hit the oncoming tennis ball." is it true that "Someone playing tennis."?.
Teacher: Let's think:

A tennis player moving to hit tennis ball is the same as someone is playing tennis. So the final answer is yes.