Sentence 1: A young man in a red and gray shirt and blue jeans is walking outside with a cellphone in his hand. Sentence 2: A person is talking to his mother on his cell phone.


Context: A young man in a red and gray shirt and blue jeans is walking outside with a cellphone in his hand.
Hypothesis: A person is talking to his mother on his cell phone.

Given this context, is the hypothesis true (Yes/No/I don't know)?