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: For instance, a common use of a database system is to track information about users, their name, login information, various addresses and phone numbers. In the navigational approach all of this data would be placed in a single record, and unused items would simply not be placed in the database. In the relational approach, the data would be normalized into a user table, an address table and a phone number table (for instance). Records would be created in these optional tables only if the address or phone numbers were actually provided.
How is a database system rarely used?

Passage: The climate of Antarctica does not allow extensive vegetation to form. A combination of freezing temperatures, poor soil quality, lack of moisture, and lack of sunlight inhibit plant growth. As a result, the diversity of plant life is very low and limited in distribution. The flora of the continent largely consists of bryophytes. There are about 100 species of mosses and 25 species of liverworts, but only three species of flowering plants, all of which are found in the Antarctic Peninsula: Deschampsia antarctica (Antarctic hair grass), Colobanthus quitensis (Antarctic pearlwort) and the non-native Poa annua (annual bluegrass). Growth is restricted to a few weeks in the summer.
What allows extensive vegitation to occur?

Passage: The FA Cup winners qualify for the following season's UEFA Europa League (formerly named the UEFA Cup; until 1998 they entered the Cup Winners' Cup instead). This European place applies even if the team is relegated or is not in the English top flight. In the past, if the FA Cup winning team also qualified for the following season's Champions League or Europa League through their league position, then the losing FA Cup finalist was given the Europa League place instead. FA Cup winners enter the Europa League at the group stage. Losing finalists, if they entered the Europa League, began earlier, at the play-off or third qualifying round stage. From the 2015–16 UEFA Europa League season, however, UEFA will not allow the runners-up to qualify for the Europa League through the competition.

What do FA Cup losers qualify for?