People walk around and laugh outside.
A group of people are laughing and having fun outside
People are laughing is a restatement of people laugh. People laughing are having fun.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_outside(x2) & of(x2,x3) & n_laugh(x3) & a_around(s1) & Theme(s1,x2) & n_people(x1))
exists e2 e1 s1 x1 x2 x3 x4 x5.(a_outside(s1) & Manner(e2,s1) & Theme(e2,x5) & Actor(e2,x3) & v_have(e2) & n_fun(x5) & of(x3,x4) & n_people(x4) & n_group(x3) & Actor(e1,x1) & v_laugh(e1) & of(x1,x2) & n_people(x2) & n_group(x1))