Two people pose for a picure holding a card that says "know what this is?"
The two people are friends
Two people posing for a picture implies they are friends.
exists e1 e3 e2 p1 x1 x2 x3 x4 x5.(for(e1,x2) & Theme(e3,x4) & Actor(e3,x3) & v_hold(e3) & exists e4 p2 x6.(n_thing(x6) & Theme(e4,x6) & Actor(e4,x5) & v_know(e4) & (x1 = x6)) & n_thing(x1) & Topic(e2,p1) & Actor(e2,x5) & v_say(e2) & (x4 = x5) & n_card(x4) & (x2 = x3) & n_picure(x2) & Actor(e1,x1) & v_pose(e1) & n_people(x1) & card_eq_2(x1))
exists p1 x1.(n_people(x1) & card_eq_2(x1) & exists x2.((x1 = x2) & n_friend(x2)))