Apologies - no I don't have problem with the information, I just wondered where "Fairground" had come from.
OK, there is a combination of information on 1911 census - Mary Jane is a "Stallholder (at Fairs)" and is living at Market Ground, off Bolton Road, Pendlebury. However, personally, I'm not sure that that means that Market Ground is a fairground.

1911 entries either side of Mary Jane show addresses of 602 and 614 Bolton Road.