what are all the teams in the 2012-13 southern football league?
merthyr town, paulton rovers, evesham united, winchester city, clevedon town, cinderford town, tiverton town, wimborne town, didcot town, swindon supermarine, bridgwater town, hungerford town, mangotsfield united, taunton town, abingdon united, poole town, north leigh, yate town, bishop's cleeve, sholing, shortwood united, cirencester town
which ones have venue with a capacity within the range of 3,000 to 4,000 (inclusive)?
clevedon town, cinderford town, tiverton town, wimborne town, didcot town, swindon supermarine
of these, which one has the same capacity as didcot town's venue?
swindon supermarine