A singer is hot and sweaty from performing in a concert.
Nobody is performing
A singer performing as opposed to nobody performing.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(x3,s1) & in(e1,x5) & n_concert(x5) & Actor(e1,x4) & v_perform(e1) & (x3 = x4) & n_sweaty(x3) & subset_of(x1,s1) & Theme(s2,x2) & a_hot(s2) & (x1 = x2) & n_singer(x1))
-exists e1 x1.(Actor(e1,x1) & v_perform(e1) & n_person(x1))