The conversation between human and AI assistant.
[|Human|] Given a reference text about Lasantha Rodrigo, tell me how long he worked as a mechanical engineer and who worked for.
[|AI|] Lasantha Rodrigo worked as a mechanical engineer for Ceylon Cold Stores for 31 years.
[|Human|] 
Given a reference text about Lasantha Rodrigo, tell me how long he worked as a mechanical engineer and who worked for.