A group of people are playing instruments while sitting at a table.
A group of people are holding a huge concert in the park.
playing instruments while sitting at a table is not the same as holding a huge concert
exists e2 e1 x1 x2 x3 x4.(while(e1,e2) & at(e2,x4) & n_table(x4) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_instrument(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 s1 x1 x2 x3 x4.(n_park(x4) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_hold(e1) & n_concert(x3) & a_huge(s1) & Theme(s1,x3) & of(x1,x2) & n_people(x2) & n_group(x1))