A army guy is talking on his walkie-talkie.
A military personnel is calling for backup.
A army guy talking on his walkie-talkie could be communicating any information so it is not guaranteed he is calling for backup.
exists e1 x1 x2 x3.(on(e1,x3) & n_walkie-talkie(x3) & of(x3,x1) & n_male(x1) & Actor(e1,x1) & v_talk(e1) & n_guy(x1) & of(x1,x2) & n_army(x2))
exists e1 s1 x1 x2.(for(e1,x2) & n_backup(x2) & Actor(e1,x1) & v_call(e1) & n_personnel(x1) & a_military(s1) & Theme(s1,x1))