Given the task definition and input, reply with output. This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.

Passage: As of 2004[update], 2532 telephone main lines are in use, a mix of analog (2500) and digital (32) circuits. Satellite communications services are planned.[citation needed] There is one locally based radio station (Radio Norfolk 89.9FM), broadcasting on both AM and FM frequencies. There is also one TV station, Norfolk TV, featuring local programming, plus transmitters for Australian channels ABC, SBS, Imparja Television and Southern Cross Television. The Internet country code top-level domain (ccTLD) is .nf.
How many main telephone lines were being stolen on Norfolk Island as of 2004?