PERSON@1 , opened March NUMBER@1 , NUMBER@2 by the LOCATION@1 ; first served by the Piccadilly line October NUMBER@3 , NUMBER@4 -LRB- from here to LOCATION@2 trains share track with Metropolitan Line , and some trains terminate here -RRB- .

Northfields , opened NUMBER@5 April NUMBER@6 by the District -LRB- one of the two depots is here and some trains terminate here -RRB- ; first served by the Piccadilly Line NUMBER@7 January NUMBER@4 . PERSON@1 , opened March NUMBER@1 , NUMBER@2 by the LOCATION@1 ; first served by the Piccadilly Line October NUMBER@3 , NUMBER@4 -LRB- from here to LOCATION@2 trains share track with Metropolitan Line , and some trains terminate here -RRB- .
