A man with a backpack running downhill.
A man in the forest is being chased by a bear.
do not know if the man is in forest getting chased by a bear.
exists e1 x1 x2 x3.(a_topic(x1) & with(x1,x2) & n_downhill(x2) & Actor(e1,x2) & v_run(e1) & of(x2,x3) & n_backpack(x3) & n_man(x1))
exists e1 x1 x2 x3.(n_forest(x2) & Actor(e1,x3) & n_bear(x3) & Theme(e1,x1) & v_chase(e1) & in(x1,x2) & n_man(x1))