The dog in the red vest runs in the field.
The dog is nice.
WE DON'T KNOW THAT THE DOG IS NICE.
exists s1 x1 x2 x3 x4.(n_field(x4) & n_run(x2) & of(x2,x3) & n_vest(x3) & a_red(s1) & Theme(s1,x2) & n_dog(x1) & a_topic(x1) & in(x1,x2) & in(x2,x4))
exists s1 x1.(n_dog(x1) & Theme(s1,x1) & a_nice(s1))