A man can walk behind two men without any relationship existing between them, it cannot automatically be assumed that they are coworkers; also, men can walk for many reasons, it is not necessarily because they are on their way to have lunch.


Context: A man with a green backpack is walking through the rain behind two men, one of whom has an umbrella.
Hypothesis: Three coworkers are walking through the rain on their way to have lunch.

Given this context, determine if the hypothesis is true (Yes, no, or unknown)?