Eight people are sitting in two parallel rows with 4 people each in such a way that there is equal distance between adjacent persons. P, Q, R and S are seated in the same row facing south. L, M, N and O are seated in the same row facing north. L sits to the extreme left of the row and faces R who sits exactly opposite him. P sits second to the left of R and is exactly opposite O. M sits at the extreme right of their row and is exactly opposite S. Who sits exactly opposite Q?