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.

Input: Consider Input: Passage: Santa Monica was long inhabited by the Tongva people. Santa Monica was called Kecheek in the Tongva language. The first non-indigenous group to set foot in the area was the party of explorer Gaspar de Portola, who camped near the present day intersection of Barrington and Ohio Avenues on August 3, 1769. There are two different versions of the naming of the city. One says that it was named in honor of the feast day of Saint Monica (mother of Saint Augustine), but her feast day is actually May 4. Another version says that it was named by Juan Crespi on account of a pair of springs, the Kuruvungna Springs (Serra Springs), that were reminiscent of the tears that Saint Monica shed over her son's early impiety.

Output: What language did Gaspar de Portola speak?

Input: Consider Input: Passage: African Americans made up 41 percent of death row inmates while making up only 12.6 percent of the general population. (They have made up 34 percent of those actually executed since 1976.) However, that number is lower than that of prison inmates, which is 47 percent. According to the US Department of Justice, African Americans accounted for 52.5% of homicide offenders from 1980 to 2008, with whites 45.3% and Native Americans and Asians 2.2%. This means African Americans are less likely to be executed on a per capita basis. However, according to a 2003 Amnesty International report, blacks and whites were the victims of murder in almost equal numbers, yet 80 percent of the people executed since 1977 were convicted of murders involving white victims. 13.5% of death row inmates are of Hispanic or Latino descent, while they make up 17.4% of the general population.

Output: What percentage of American death row prisoners are South American

Input: Consider Input: Passage: Environmental damage in Thuringia has been reduced to a large extent after 1990. The condition of forests, rivers and air was improved by modernizing factories, houses (decline of coal heating) and cars, and contaminated areas such as the former Uranium surface mines around Ronneburg have been remediated. Today's environmental problems are the salination of the Werra river, caused by discharges of K+S salt mines around Unterbreizbach and overfertilisation in agriculture, damaging the soil and small rivers.
Output: When has environmental damage in Thuringia been increased since?