A group of people, some with orange vests, plant a tree together.
People are outside.
If they plant a tree they are outside.
exists x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & rel(x2,x3) & all x6.(n_tree(x6) -> exists x7.(rel(x3,x7) & r_together(x7) & for(x7,x6) & n_plant(x7))) & with(x3,x4) & n_vest(x4) & of(x4,x5) & n_orange(x5) & n_thing(x3) & n_people(x2) & n_group(x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_people(x1))