A large group of people are dining in a restaurant and smiling for the camera.
A family is enjoying lunch together.
Not all large groups of people are family and dining together does not imply it being lunch.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(n_camera(x6) & for(e2,x6) & Actor(e2,x4) & v_smile(e2) & of(x4,x5) & n_people(x5) & n_group(x4) & a_large(s2) & Theme(s2,x4) & in(e1,x3) & n_restaurant(x3) & Actor(e1,x1) & v_dine(e1) & of(x1,x2) & n_people(x2) & n_group(x1) & a_large(s1) & Theme(s1,x1))
exists e1 p1 x1 x2.(exists s1.(Theme(s1,x2) & a_together(s1)) & Recipient(e1,p1) & Actor(e1,x1) & Topic(e1,x2) & v_enjoy(e1) & n_lunch(x2) & n_family(x1))