A groups of seven people wearing green shirts is walking along a sandy beach.
a group of people in shirts on a beach.
Both sentences imply that there is a group of people wearing shirts at a beach.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5.(along(e2,x5) & n_beach(x5) & a_sandy(s2) & Theme(s2,x5) & Actor(e2,x1) & v_walk(e2) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_shirt(x4) & a_green(s1) & Theme(s1,x4) & (x2 = x3) & n_people(x2) & card_eq_7(x2) & n_group(x1))
exists x1 x2 x3 x4.(a_topic(x1) & on(x1,x4) & n_beach(x4) & of(x1,x2) & in(x2,x3) & n_shirt(x3) & n_people(x2) & n_group(x1))