Dancers in tight black garb perform their routine.
A group is exercising.
Dancers is a group and they are performing their routine is exercising.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_perform(e1) & n_routine(x3) & of(x3,x1) & n_thing(x1) & in(x1,x2) & n_garb(x2) & a_black(s2) & Theme(s2,x2) & a_tight(s1) & Theme(s1,x2) & n_dancer(x1))
exists e1 x1.(Actor(e1,x1) & v_exercise(e1) & n_group(x1))