Some teenagers smile from an outdoor table.
The weather was nice.
Just because the weather is nice does not mean that's why the teenagers are smiling.
exists e1 s1 x1 x2.(from(e1,x2) & n_table(x2) & a_outdoor(s1) & Theme(s1,x2) & Actor(e1,x1) & v_smile(e1) & n_teenager(x1))
exists s1 x1.(n_weather(x1) & Theme(s1,x1) & a_nice(s1))