Complex sentence: Originally developed within the Parrot project, the Rakudo source code repository was split from the project in February 2009 so that it could be developed independently, although there were still many dependencies at the time.
Split into simpler sentences: Originally developed within the Parrot project, the Rakudo source code repository was split from the project in February 2009 so that it could be developed independently. Though, there were still many dependencies at the time.