Students attend a math lecture at university.
The young children are at the theater.
There can't take place a math lecture at a theater.
exists e1 x1 x2 x3 x4.(ne_nam_students(x1) & at(e1,x4) & n_university(x4) & Theme(e1,x2) & Actor(e1,x1) & v_attend(e1) & n_lecture(x2) & of(x2,x3) & n_math(x3))
exists p1 s1 x1 x2.(n_theater(x2) & n_child(x1) & a_young(s1) & Theme(s1,x1) & at(x1,x2))