They are filming a weather warning.
A news crew films in a gathering storm.
Just because they are filming a weather warning doesn't mean they are in a gathering storm.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_film(e1) & n_warning(x2) & of(x2,x1) & n_weather(x1) & n_thing(x1))
exists x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x4) & n_storm(x4) & of(x4,x5) & n_gathering(x5) & n_film(x1) & of(x1,x3) & n_crew(x3) & of(x1,x2) & n_news(x2))