TASK 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.
PROBLEM: Passage: Labour improved its performance in 1987, gaining 20 seats and so reducing the Conservative majority from 143 to 102. They were now firmly re-established as the second political party in Britain as the Alliance had once again failed to make a breakthrough with seats. A merger of the SDP and Liberals formed the Liberal Democrats. Following the 1987 election, the National Executive Committee resumed disciplinary action against members of Militant, who remained in the party, leading to further expulsions of their activists and the two MPs who supported the group.

SOLUTION: When did Labour worsen its performance?

PROBLEM: Passage: The structure of a mosque is simple and it expresses openness. Calligraphic inscriptions from the Quran decorate mosques and mausoleums in Punjab. The inscriptions on bricks and tiles of the mausoleum of Shah Rukn-e-Alam (1320 AD) at Multan are outstanding specimens of architectural calligraphy. The earliest existing building in South Asia with enamelled tile-work is the tomb of Shah Yusuf Gardezi (1150 AD) at Multan. A specimen of the sixteenth century tile-work at Lahore is the tomb of Sheikh Musa Ahangar, with its brilliant blue dome. The tile-work of Emperor Shah Jahan is of a richer and more elaborate nature. The pictured wall of Lahore Fort is the last line in the tile-work in the entire world.

SOLUTION: Where does the structure of a mosque come from?

PROBLEM: Passage: Geologists use a number of field, laboratory, and numerical modeling methods to decipher Earth history and understand the processes that occur on and inside the Earth. In typical geological investigations, geologists use primary information related to petrology (the study of rocks), stratigraphy (the study of sedimentary layers), and structural geology (the study of positions of rock units and their deformation). In many cases, geologists also study modern soils, rivers, landscapes, and glaciers; investigate past and current life and biogeochemical pathways, and use geophysical methods to investigate the subsurface.

SOLUTION:
What do scientists use to determine the process of river movement?