A man in a choir robe is standing at a microphone while the choir sits behind him.
The robes are made of heavy wool.
Not all choir robe are made of heavy wood
exists e1 p1 x1 x2 x3 x4.(exists e2.(behind(e2,x1) & Actor(e2,x3) & v_sit(e2)) & n_male(x1) & n_choir(x3) & n_choir(x3) & while(e1,p1) & at(e1,x4) & n_microphone(x4) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_robe(x2) & of(x2,x3) & n_man(x1))
exists e1 s1 x1 x2.(n_robe(x1) & of(e1,x2) & n_wool(x2) & a_heavy(s1) & Theme(s1,x2) & Theme(e1,x1) & v_make(e1))