The Maryland Terps marching band performs at a football game.
A marching band practices in an empty stadium.
Answer: Either the band practices or performs . one cannot do both simultaneously.
exists e1 s1 x1 x2 x3 x4 x5 x6.(ne_org_terps(s1) & (s1 = x1) & ne_org_maryland(x1) & a_topic(s1) & at(e1,x5) & n_game(x5) & of(x5,x6) & n_football(x6) & Theme(e1,x3) & Actor(e1,x2) & v_march(e1) & n_perform(x3) & of(x3,x4) & n_band(x4) & (s1 = x2))
exists e1 s1 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_stadium(x3) & a_empty(s1) & Theme(s1,x3) & n_practice(x1) & of(x1,x2) & n_band(x2) & Actor(e1,x1) & v_march(e1))