A bunch on people are seated in a stadium.
People are gathered together.
When "people are seated in a stadium" is can be decuded that they are "gathered together" due to the nature of a stadium.
exists e1 x1 x2 x3.(in(e1,x3) & n_stadium(x3) & Theme(e1,x1) & v_seat(e1) & on(x1,x2) & n_people(x2) & n_bunch(x1))
exists e1 s1 x1.(a_together(s1) & Manner(e1,s1) & Theme(e1,x1) & v_gather(e1) & n_people(x1))