A group of people are surrounding a person who is lying down.
There are people gathered together in a group.
People are surrounding a person implies they are gathered together.
exists e2 e1 s1 x1 x2 x3 x4.(Theme(e2,x3) & Actor(e2,x1) & v_surround(e2) & a_down(s1) & Manner(e1,s1) & Actor(e1,x4) & v_lie(e1) & (x3 = x4) & n_person(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1 e1 s1 x2 x3 x4.((x1 = x2) & in(e1,x4) & n_group(x4) & a_together(s1) & Manner(e1,s1) & Theme(e1,x3) & v_gather(e1) & (x2 = x3) & n_people(x2))