A security officer uses her radio.
An officer uses her radio to call for backup.
A scurity officer does not necessarily use her radio only to call for backup.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_use(e1) & n_radio(x3) & of(x3,x1) & n_female(x1) & n_officer(x1) & of(x1,x2) & n_security(x2))
exists e1 p1 x1 x2.(Theme(e1,p1) & Recipient(e1,x2) & Actor(e1,x1) & v_use(e1) & exists e2 x3.(for(e2,x3) & n_backup(x3) & Actor(e2,x1) & v_call(e2)) & n_radio(x2) & of(x2,x1) & n_female(x1) & n_officer(x1))