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.

[EX Q]: Passage: The most common Persian word is Masihi (), from Arabic.,Other words are Nasrani (), from Syriac for "Nazarene", and Tarsa (), from Middle Persian word Tarsag, also meaning "Christian", derived from tars, meaning "fear, respect".
[EX A]: Which term is the most uncommon Persian word for Christian?

[EX Q]: Passage: Other types of lossy compressors, such as the linear predictive coding (LPC) used with speech, are source-based coders. These coders use a model of the sound's generator (such as the human vocal tract with LPC) to whiten the audio signal (i.e., flatten its spectrum) before quantization. LPC may be thought of as a basic perceptual coding technique: reconstruction of an audio signal using a linear predictor shapes the coder's quantization noise into the spectrum of the target signal, partially masking it.
[EX A]: What is thought of as a basic signal coding technique?

[EX Q]: Passage: The 1903 advent of heavier-than-air fixed-wing aircraft was closely followed in 1910 by the first experimental take-off of an airplane, made from the deck of a United States Navy vessel (cruiser USS Birmingham), and the first experimental landings were conducted in 1911. On 9 May 1912 the first airplane take-off from a ship underway was made from the deck of the British Royal Navy's HMS Hibernia. Seaplane tender support ships came next, with the French Foudre of 1911. In September 1914 the Imperial Japanese Navy Wakamiya conducted the world's first successful ship-launched air raid: on 6 September 1914 a Farman aircraft launched by Wakamiya attacked the Austro-Hungarian cruiser SMS Kaiserin Elisabeth and the German gunboat Jaguar in Kiaochow Bay off Tsingtao; neither was hit. The first carrier-launched airstrike was the Tondern Raid in July 1918. Seven Sopwith Camels launched from the converted battlecruiser HMS Furious damaged the German airbase at Tnder and destroyed two zeppelins.
[EX A]:
In what year was the advent of lighter-than-air fixed-wing aircraft?