Outside of an aquarium on a sunny day.
The sky is blue.
The fact that it is a sunny day doesn't imply that the sky is blue.
exists s1 x1 x2 x3.(of(x1,x2) & on(x2,x3) & n_day(x3) & a_sunny(s1) & Theme(s1,x3) & n_aquarium(x2) & r_outside(x1) & n_event(x1))
exists s1 x1.(n_sky(x1) & Theme(s1,x1) & a_blue(s1))