Four people are sitting on blue and green couches, while a fifth man sitting aside looks on, underneath a sprawling red tree.
Nobody is sitting.
Either nobody is sitting, or some or all of the people are sitting.
exists e1 p1 s1 s2 x1 x2.(exists e4 e3 e2 s3 s4 s5 s6 x3 x4 x5.(underneath(e3,x5) & n_tree(x5) & a_red(s6) & Theme(s6,x5) & Actor(e4,x5) & v_sprawl(e4) & a_on(s5) & Manner(e3,s5) & Actor(e3,x3) & v_look(e3) & a_aside(s4) & Manner(e2,s4) & Actor(e2,x4) & v_sit(e2) & (x3 = x4) & n_man(x3) & a_fifth(s3) & Theme(s3,x3)) & while(e1,p1) & on(e1,x2) & n_couch(x2) & a_green(s2) & Theme(s2,x2) & a_blue(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_4(x1))
-exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_person(x1))