Men in the park.
Men are playing Frisbee together while people sunbathe.
Men being in the park may not be together.  There could be an activity other than playing Frisbee.  The men could be alone in the park and not there while people sunbathe.
exists x1 x2.(n_park(x2) & a_topic(x1) & in(x1,x2) & n_man(x1))
exists e1 p1 s1 x1 x2.(ne_per_frisbee(x2) & exists e2 x3.(Actor(e2,x3) & v_sunbathe(e2) & n_people(x3)) & while(e1,p1) & a_together(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))