Leo: If "Several government workers working on a railroad crossing." does that mean that "Some people are replacing the rail signs."?\nOptions:\n- yes\n- it is not possible to tell\n- no
Mei: OK, So, let's think first...
Me:
User
Replacing the rail signs is not the only possible way for people to work on a railroad crossing.
Thus, the answer is it is not possible to tell.
Assistant