People talking and having fun.
Some people enjoy talking with each other.
having fun can be rephrased as enjoying.
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_have(e2) & n_fun(x4) & n_people(x3) & Theme(e1,x2) & Actor(e1,x1) & v_talk(e1) & n_fun(x2) & n_people(x1))
exists e1 p1 x1.(exists e2.(all x2.(n_other(x2) -> with(e2,x2)) & Actor(e2,x1) & v_talk(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_enjoy(e1) & n_people(x1))