Detailed Instructions: 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.
Q: Passage: Between 1949 and the 1980s, telephone communications in Greece were a state monopoly by the Hellenic Telecommunications Organization, better known by its acronym, OTE. Despite the liberalization of telephone communications in the country in the 1980s, OTE still dominates the Greek market in its field and has emerged as one of the largest telecommunications companies in Southeast Europe. Since 2011, the company's major shareholder is Deutsche Telekom with a 40% stake, while the Greek state continues to own 10% of the company's shares. OTE owns several subsidiaries across the Balkans, including Cosmote, Greece's top mobile telecommunications provider, Cosmote Romania and Albanian Mobile Communications.
A:
Who removed the phones in Greece between 1949 and the 1980s?