A man surfs in bright, blue water.
There are people surfing and swimming in the beach.
Sentence 2 cannot occur because it is impossible.  Also, it cannot be inferred that there is more than one person or that anyone is swimming or that there is a beach, because the location is unknown.
exists e1 s1 s2 s3 x1 x2.(in(e1,x2) & n_water(x2) & a_blue(s3) & Theme(s3,x2) & a_,(s2) & Theme(s2,x2) & a_bright(s1) & Theme(s1,x2) & Actor(e1,x1) & v_surf(e1) & n_man(x1))
exists p1 x1 x5.(n_beach(x5) & exists e1 e2 x2 x3 x4.((x1 = x2) & in(e2,x5) & Actor(e2,x4) & v_swim(e2) & (x2 = x4) & Actor(e1,x3) & v_surf(e1) & (x2 = x3) & n_people(x2)))