Martial arts students practice outside building.
A group of musicians is having a jam session in a nightclub's back room.
Martial arts and musicians are two different forms of art.  They cannot be in a nightclub's back room and outside of a building simultaneously.
exists e1 p1 x1 x2.(ne_nam_martial(x1) & exists e2 s1 x3.(Theme(e2,x3) & Actor(e2,x2) & v_practice(e2) & n_building(x3) & a_outside(s1) & Theme(s1,x3)) & Recipient(e1,p1) & Actor(e1,x1) & Topic(e1,x2) & v_art(e1) & n_student(x2))
exists e1 s1 x1 x2 x3 x4 x5 x6.(in(e1,x6) & n_room(x6) & a_back(s1) & Theme(s1,x6) & of(x6,x5) & n_nightclub(x5) & Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_session(x3) & of(x3,x4) & n_jam(x4) & of(x1,x2) & n_musician(x2) & n_group(x1))