A group of people holding up a bed sheet like a parachute while two people run underneath to fetch a soccer ball.
The people are engaging in a group activity.
Run, fetch, hold are type of activities and the fact that the people are doing some of these activities implies they are engaging in such activities.
exists e1 p1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & of(x1,x2) & exists e2 p2 x7 x8.(Theme(e2,x8) & Actor(e2,x7) & v_run(e2) & Topic(x8,p2) & exists e3 x9 x10.(Theme(e3,x9) & Actor(e3,x8) & v_fetch(e3) & n_ball(x9) & of(x9,x10) & n_soccer(x10)) & n_underneath(x8) & n_people(x7) & card_eq_2(x7)) & while(e1,p1) & a_up(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x3) & v_hold(e1) & like(x4,x6) & n_parachute(x6) & n_sheet(x4) & of(x4,x5) & n_bed(x5) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_people(x1) & in(e1,x2) & n_activity(x2) & of(x2,x3) & n_group(x3) & Actor(e1,x1) & v_engage(e1))