A band performing on stage while the crowd observes with there hands in the air.
The band is performing at concert.
A band could be performing at something other than a concert.
exists e1 p1 x1 x2 x3 x4 x7.(n_air(x7) & n_crowd(x4) & a_topic(x1) & exists e2 x5 x6.(in(e2,x7) & with(e2,x6) & Theme(e2,x5) & Actor(e2,x4) & v_observe(e2) & n_hand(x5)) & while(e1,p1) & on(e1,x3) & n_stage(x3) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_band(x1))
exists e1 x1 x2.(n_band(x1) & at(e1,x2) & n_concert(x2) & Actor(e1,x1) & v_perform(e1))