A man is rowing a boat through a river in a city.
The river is calm.
The first sentence doesn't give us any info to say infer if the river was calm or not.
exists e1 x1 x2 x3 x4.(through(e1,x3) & in(x3,x4) & n_city(x4) & n_river(x3) & Theme(e1,x2) & Actor(e1,x1) & v_row(e1) & n_boat(x2) & n_man(x1))
exists s1 x1.(n_river(x1) & Theme(s1,x1) & a_calm(s1))