Can we conclude from "Group of young women and men dressed formally eat their lunches." that "They were at a conference."?
Options:
- yes
- no
- it is not possible to tell
Let's solve step-by-step:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
People can be dressed nice without having been at a conference. The answer is it is not possible to tell.