Simplify the following text for a Grade 12 native English-speaking person.
Original: They emerged , along with a Time Lord prison containing millions of Daleks , at Canary Wharf due to the actions of the Torchwood Institute and Cybermen from a parallel world , leading to a Cyberman-Dalek clash in London .
Simplified: They emerged , along with a Time Lord prison vessel containing millions of Daleks , at Canary Wharf due to the actions of the Torchwood Institute and Cybermen from a parallel world .