sentences:  Since 2008, Sci-Fi-London has also held a second festival in October, called Oktoberfest.This normally takes the form of a shorter festival, held at venues including the Apollo Piccadilly Circus, the Stratford Picturehouse, the Royal Observatory, Greenwich and the Royal Society.The next Sci Fi London Film Festival will be on the 13th to the 20th May and will be based at Stratford Picturehouse.