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: On 24 August, Pravda and Izvestia carried news of the non-secret portions of the Pact, complete with the now infamous front-page picture of Molotov signing the treaty, with a smiling Stalin looking on. The news was met with utter shock and surprise by government leaders and media worldwide, most of whom were aware only of the British–French–Soviet negotiations that had taken place for months. The Molotov–Ribbentrop Pact was received with shock by Nazi Germany's allies, notably Japan, by the Comintern and foreign communist parties, and by Jewish communities all around the world. So, that day, German diplomat Hans von Herwarth, whose grandmother was Jewish, informed Guido Relli, an Italian diplomat, and American chargé d'affaires Charles Bohlen on the secret protocol regarding vital interests in the countries' allotted "spheres of influence", without revealing the annexation rights for "territorial and political rearrangement".
answer:
Which diplomat never leaked information about the secret agreements?


question:
Passage: Northwestern is a large, residential research university. Accredited by the North Central Association of Colleges and Schools and the respective national professional organizations for chemistry, psychology, business, education, journalism, music, engineering, law, and medicine, the university offers 124 undergraduate programs and 145 graduate and professional programs. Northwestern conferred 2,190 bachelor's degrees, 3,272 master's degrees, 565 doctoral degrees, and 444 professional degrees in 2012–2013.
answer:
How many undergraduate programs are offered by Southwestern?


question:
Passage: The gospels of Matthew and Luke in the New Testament describe Mary as a virgin (Greek: παρθένος, parthénos) and Christians believe that she conceived her son while a virgin by the Holy Spirit. This took place when she was already betrothed to Joseph and was awaiting the concluding rite of marriage, the formal home-taking ceremony. She married Joseph and accompanied him to Bethlehem, where Jesus was born. According to ancient Jewish custom, Mary could have been betrothed at about 12, however, there is no direct evidence of Mary's age at betrothal or in pregnancy. The term "betrothal" is an awkward translation of kiddushin; according to the Jewish law those called "betrothed" were actually husband and wife.
answer:

How old was Mary when she met Joseph?