People stand around at some sort of gathering.
People attend a protest gathering.
People could be standing around at a meeting, not a protest.
exists e1 s1 x1 x2 x3.(at(e1,x2) & of(x2,x3) & n_gathering(x3) & n_sort(x2) & a_around(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_attend(e1) & n_gathering(x2) & of(x2,x3) & n_protest(x3) & n_people(x1))