Student: Given the sentence "A child is looking up at an adult while sitting in a stroller on a city sidewalk." is it true that "The child is sitting in a stroller."?.
Teacher: Let's think:

A child is looking up at an adult while sitting in a stroller is a rewording of the child is sitting in a stroller. So the final answer is yes.
Student: Given the sentence "A child is looking up at an adult while sitting in a stroller on a city sidewalk." is it true that "The child is sitting in a stroller."?.
Teacher: Let's think:

user
A child is looking up at an adult while sitting in a stroller is a rewording of the child is sitting in a stroller. So the final answer is yes.
assistant
Student: Given the sentence "A child is looking up at an adult while sitting in a stroller on a city sidewalk." is it true that "The child is sitting in a stroller."?.
Teacher: Let's think:

A child is looking up at an adult while sitting in a stroller is a rewording of the child is sitting in a stroller. So the final answer is yes.