Definition: 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.
Input: Passage: The city is also in the process of implementing a 5-year and 20 year Bike Action Plan with a goal of attaining 14 to 35% bicycle transportation mode share by 2030 through the installation of enhanced bicycle infrastructure throughout the city. Other environmentally focused initiatives include curbside recycling, curbside composting bins (in addition to trash, yard-waste, and recycle bins), farmers' markets, community gardens, garden-share, an urban forest initiative, a hazardous materials home-collection service, green business certification, and a municipal bus system which is currently being revamped to integrate with the soon-to-open Expo Line.
Output:
In what year will the Expo Line be opened?