A group of young men and women stand in front of the stage at a concert.
A group of people are attending a concert.
Concert is used for attending.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_stage(x6) & at(e1,x7) & n_concert(x7) & in(e1,x5) & of(x5,x6) & n_front(x5) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_woman(x4) & n_man(x3) & subset_of(x4,x2) & subset_of(x3,x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_attend(e1) & n_concert(x3) & of(x1,x2) & n_people(x2) & n_group(x1))