This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

At the same time he made attempts to help grow ABC, Goldenson had been trying since mid-1953 to provide content for the network by contacting his old acquaintances in Hollywood, with whom he had worked when UPT was a subsidiary of Paramount Pictures. ABC's merger with UPT led to the creation of relationships with Hollywood's film production studios, breaking a quarantine that had existed at that time between film and television, the latter of which had previously been more connected to radio. ABC's flagship productions at the time were The Lone Ranger, based on the radio program of the same title, and The Adventures of Ozzie and Harriet, the latter of which (at 13 seasons, running from 1952 to 1965) held the record for the longest-running prime time comedy in U.S. television history, until it was surpassed by The Simpsons in 2002.
Of what hollywood film company was UPT a subsidiary of when it merged with ABC?