In the sentences extracted from financial agreements in U.S. SEC filings, identify the named entities that represent a person ('PER'), an organization ('ORG'), or a location ('LOC'). The required answer format is: 'entity name, entity type'.
Text: The systems of conveyors leading to and from yard storage are controlled from a central control room atop transfer tower TT2 or from other computer sites .
Answer:
central control room atop transfer tower TT2, LOC