Directions :  Answer the questions based on the information given below.  

Ten persons are sitting at equal distance with each other in two parallel rows. P, Q, R, S and T are sitting in row 1, facing towards north and A, B, C, D and E are sitting in row 2, facing towards south. Persons in row 1 and row 2 are facing each other. There is no vacant seat. Two persons are sitting between S and R, who is sitting opposite to C, who is sitting 3rd to the left of D. P is sitting opposite to B, who is sitting to the immediate right of D. Q is sitting to the immediate left of the person, who is sitting opposite to E. 

How many persons are sitting between D and E?