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: Blues rock acts that pioneered the sound included Cream, The Jimi Hendrix Experience, and The Jeff Beck Group. Cream, in songs like "I Feel Free" (1966) combined blues rock with pop and psychedelia, particularly in the riffs and guitar solos of Eric Clapton. Jimi Hendrix produced a form of blues-influenced psychedelic rock, which combined elements of jazz, blues and rock and roll. From 1967 Jeff Beck brought lead guitar to new heights of technical virtuosity and moved blues rock in the direction of heavy rock with his band, The Jeff Beck Group. Dave Davies of The Kinks, Keith Richards of The Rolling Stones, Pete Townshend of The Who, Hendrix, Clapton and Beck all pioneered the use of new guitar effects like phasing, feedback and distortion. The Beatles began producing songs in the new hard rock style beginning with the White Album in 1968 and, with the track "Helter Skelter", attempted to create a greater level of noise than the Who. Stephen Thomas Erlewine of AllMusic has described the "proto-metal roar" of "Helter Skelter," while Ian MacDonald argued that "their attempts at emulating the heavy style were without exception embarrassing."
Who was a hard rock act that pioneered the blues sound?

Passage: In the late 19th century with the discovery of the electron, and in the early 20th century, with the discovery of the atomic nucleus, and the birth of particle physics, matter was seen as made up of electrons, protons and neutrons interacting to form atoms. Today, we know that even protons and neutrons are not indivisible, they can be divided into quarks, while electrons are part of a particle family called leptons. Both quarks and leptons are elementary particles, and are currently seen as being the fundamental constituents of matter.
What field of physics began in the 19th century?

Passage: Prior to its UK release, Spectre mostly received positive reviews. Mark Kermode, writing in The Guardian, gave the film four out of five stars, observing that the film did not live up to the standard set by Skyfall, but was able to tap into audience expectations. Writing in the same publication, Peter Bradshaw gave the film a full five stars, calling it "inventive, intelligent and complex", and singling out Craig's performance as the film's highlight. In another five star review, The Daily Telegraph's Robbie Collin described Spectre as "a swaggering show of confidence'", lauding it as "a feat of pure cinematic necromancy." In an otherwise positive, but overall less enthusiastic review, IGN's Chris Tilly considered Spectre "solid if unspectacular", and gave the film a 7.2 score (out of a possible 10), saying that "the film falls frustratingly short of greatness."

Spectre received mostly positive reviews prior to its release in what country?