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: In 1994, Comcast became the third largest cable operator in the United States with around 3.5 million subscribers following its purchase of Maclean-Hunter's American division for $1.27 billion. The company's UK branch, Comcast UK Cable Partners, goes public while constructing a cable telecommunications network. With five other media companies, the corporation becomes an original investor in The Golf Channel. Following a bid in 1994 for $2.1 billion, Comcast increased its ownership of QVC from 15.5% of stock to a majority, in a move to prevent QVC from merging with CBS. Comcast later sold its QVC shares in 2004 to Liberty Media for $7.9 billion.
How many additional subscribers did Comcast receive by merging with Maclean-Hunter?