Student: Given the sentence "People are walking down the sidewalk." can we conclude that "A group of people are walking down the sidewalk together outside."?
Options:
- yes
- it is not possible to tell
- no.
Teacher: Let's think:

Sentence 1: People are walking down the sidewalk. Sentence 2: A group of people are walking down the sidewalk together outside. So the final answer is it is not possible to tell.