A man teaches mathematics to a class.
The man is nude.
A man cannot teach nude in a mathematics class.
exists e1 x1 x2 x3.(to(e1,x3) & n_class(x3) & Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & n_mathematics(x2) & n_man(x1))
exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_nude(s1))