A group of people sitting on yellow chairs and talking.
A group of people are talking and eating.
Just because they are sitting in chairs and talking, does not imply eating anywhere.
exists e2 e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & Actor(e2,x5) & v_talk(e2) & (x1 = x5) & on(e1,x4) & n_chair(x4) & a_yellow(s1) & Theme(s1,x4) & Actor(e1,x3) & v_sit(e1) & (x1 = x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e2 e1 x1 x2 x3 x4.(Actor(e2,x3) & v_eat(e2) & of(x3,x4) & n_people(x4) & n_group(x3) & Actor(e1,x1) & v_talk(e1) & of(x1,x2) & n_people(x2) & n_group(x1))