Given the question: - ru amateurclubs is cambridge university r.u.f.c. barbarian f.c. castleford rfc wakefield rfc    - ru nationalteam is england    - ru nationalpoints is -lrb- 0 -rrb-    - birth name is john warburton sagar    - death date is 10 january 1941    - ru nationalyears is 1901      - ru nationalcaps is 2    - university is jesus college , cambridge    - birth date is 6 december 1878      - death place is bournemouth , england    - ru position is fullback    - birth place is easington , county durham , england    Given the details above, guess who could this information be about.
The answer is:
john warburton sagar