A father-figure and two children outside their home doing yard work such as using a hoe on the grass and planting a tree.
The people are standing on the grass.
Just because the father-figure and two children are outside their own doesn't mean they're standing on the grass doing nothing.
exists e1 e3 e2 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11.(n_grass(x9) & a_topic(x1) & Theme(e3,x5) & Actor(e3,x4) & v_do(e3) & n_such(x5) & Theme(e2,x11) & Actor(e2,x10) & v_plant(e2) & n_tree(x11) & (x5 = x10) & Theme(e1,x8) & Actor(e1,x7) & v_use(e1) & on(x8,x9) & n_hoe(x8) & (x5 = x7) & n_work(x5) & of(x5,x6) & n_yard(x6) & (x1 = x4) & outside(x1,x3) & n_home(x3) & of(x3,x1) & n_thing(x1) & n_child(x1) & card_eq_2(x1) & of(x1,x2) & n_father-figure(x2))
exists e1 x1 x2.(n_grass(x2) & n_people(x1) & on(e1,x2) & Actor(e1,x1) & v_stand(e1))