Martial arts students sit on the floor or stand in the background while watching a matchup between two people.
Martial arts students carefully observe the masterful fight.
Watching does not necessarily mean they are watching carefully. The fight did not have to be masterful.
exists e1 p1 x1 x3 x4.(n_background(x4) & (n_floor(x3) | n_stand(x3)) & ne_nam_martial(x1) & exists e3 e2 x2 x5 x6.(while(e2,e3) & between(e3,x6) & n_people(x6) & card_eq_2(x6) & Theme(e3,x5) & Actor(e3,x2) & v_watch(e3) & n_matchup(x5) & in(e2,x4) & on(e2,x3) & Actor(e2,x2) & v_sit(e2) & n_student(x2)) & Topic(e1,p1) & Actor(e1,x1) & v_art(e1))
exists e1 p1 s1 x1 x3.(n_fight(x3) & a_masterful(s1) & Theme(s1,x3) & ne_nam_martial(x1) & exists e2 s2 x2.(a_carefully(s2) & Manner(e2,s2) & Theme(e2,x3) & Actor(e2,x2) & v_observe(e2) & n_student(x2)) & Topic(e1,p1) & Actor(e1,x1) & v_art(e1))