Two people pose for a picure holding a card that says "know what this is?"
A couple poses for a picture shoot.
The couple might not be taking place in a shoot, it could be a one-off picture
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 e1 x1 x2 x3.(for(e1,x2) & n_shoot(x2) & of(x2,x3) & n_picture(x3) & Actor(e1,x1) & v_pose(e1) & n_couple(x1))