Original: Worf was then adopted by a human couple , Sergey and Helena Rozhenko , who raised him on a small farm colony on the planet Gault , a world of about 20,000 inhabitants , almost all of them humans .
Simplified: Worf was then adopted by a human couple , Sergey and Helena Rozhenko while his brother was raised in the Klingon homeworld and was not revealed until they were both adults .