instruction:
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.
question:
Passage: Robert Guiscard, an other Norman adventurer previously elevated to the dignity of count of Apulia as the result of his military successes, ultimately drove the Byzantines out of southern Italy. Having obtained the consent of pope Gregory VII and acting as his vassal, Robert continued his campaign conquering the Balkan peninsula as a foothold for western feudal lords and the Catholic Church. After allying himself with Croatia and the Catholic cities of Dalmatia, in 1081 he led an army of 30,000 men in 300 ships landing on the southern shores of Albania, capturing Valona, Kanina, Jericho (Orikumi), and reaching Butrint after numerous pillages. They joined the fleet that had previously conquered Corfu and attacked Dyrrachium from land and sea, devastating everything along the way. Under these harsh circumstances, the locals accepted the call of emperor Alexius I Comnenus to join forces with the Byzantines against the Normans. The Albanian forces could not take part in the ensuing battle because it had started before their arrival. Immediately before the battle, the Venetian fleet had secured a victory in the coast surrounding the city. Forced to retreat, Alexius ceded the command to a high Albanian official named Comiscortes in the service of Byzantium. The city's garrison resisted until February 1082, when Dyrrachium was betrayed to the Normans by the Venetian and Amalfitan merchants who had settled there. The Normans were now free to penetrate into the hinterland; they took Ioannina and some minor cities in southwestern Macedonia and Thessaly before appearing at the gates of Thessalonica. Dissension among the high ranks coerced the Normans to retreat to Italy. They lost Dyrrachium, Valona, and Butrint in 1085, after the death of Robert.
answer:
Who ultimatly drove the Byzantines out of Europe?


question:
Passage: The term "Sumerian" is the common name given to the ancient non-Semitic inhabitants of Mesopotamia, Sumer, by the Semitic Akkadians. The Sumerians referred to themselves as ùĝ saĝ gíg-ga (cuneiform: 𒌦 𒊕 𒈪 𒂵), phonetically /uŋ saŋ giga/, literally meaning "the black-headed people", and to their land as ki-en-gi(-r) ('place' + 'lords' + 'noble'), meaning "place of the noble lords". The Akkadian word Shumer may represent the geographical name in dialect, but the phonological development leading to the Akkadian term šumerû is uncertain. Hebrew Shinar, Egyptian Sngr, and Hittite Šanhar(a), all referring to southern Mesopotamia, could be western variants of Shumer.
answer:
What is the common name for the Semitic people Mesopotamia?


question:
Passage: Later Indian materialist Jayaraashi Bhatta (6th century) in his work Tattvopaplavasimha ("The upsetting of all principles") refuted the Nyaya Sutra epistemology. The materialistic Cārvāka philosophy appears to have died out some time after 1400. When Madhavacharya compiled Sarva-darśana-samgraha (a digest of all philosophies) in the 14th century, he had no Cārvāka/Lokāyata text to quote from, or even refer to.
answer:

What does Jayaraashi Bhatta mean?