People on ATVs and dirt bikes are traveling along a worn path in a field surrounded by trees.
The people are outside.
A path in a field is outside, therefore the people on the ATVs and dirt bikes are outside.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(ne_nam_atvs(x3) & along(e1,x6) & Actor(e2,x9) & n_tree(x9) & Theme(e2,x8) & v_surround(e2) & (x6 = x8) & in(x6,x7) & n_field(x7) & n_path(x6) & a_worn(s1) & Theme(s1,x6) & Actor(e1,x1) & v_travel(e1) & on(x1,x2) & subset_of(x4,x2) & n_bike(x4) & of(x4,x5) & n_dirt(x5) & subset_of(x3,x2) & n_people(x1))
exists s1 x1.(n_people(x1) & Theme(s1,x1) & a_outside(s1))