A hockey player guards the goal.
A player happily guards the goal.
Guarding a goal is not always done happily.
exists e1 x1 x2 x3.(n_goal(x3) & Theme(e1,x3) & Actor(e1,x1) & v_guard(e1) & n_player(x1) & of(x1,x2) & n_hockey(x2))
exists e1 s1 x1 x2.(n_goal(x2) & a_happily(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_guard(e1) & n_player(x1))