A man is on his phone while sitting on a chair along a rocky beach.
A guy talks on the phone.
A man is on his phone while sitting on a chair along a rocky beach does not necessary that a guy talks on the phone.
exists e1 p1 s1 x1 x2 x3 x4.(while(p1,e1) & along(e1,x3) & n_beach(x3) & a_rocky(s1) & Theme(s1,x3) & on(e1,x2) & n_chair(x2) & Actor(e1,x1) & v_sit(e1) & on(x1,x4) & n_phone(x4) & of(x4,x1) & n_male(x1) & n_man(x1))
exists x1 x2 x3.(n_phone(x3) & a_topic(x1) & on(x1,x3) & n_talk(x1) & of(x1,x2) & n_guy(x2))