This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Q: Advances were made in irrigation and farming, using new technology such as the windmill. Crops such as almonds and citrus fruit were brought to Europe through al-Andalus, and sugar cultivation was gradually adopted by the Europeans. Arab merchants dominated trade in the Indian Ocean until the arrival of the Portuguese in the 16th century. Hormuz was an important center for this trade. There was also a dense network of trade routes in the Mediterranean, along which Muslim countries traded with each other and with European powers such as Venice, Genoa and Catalonia. The Silk Road crossing Central Asia passed through Muslim states between China and Europe.

A: which crops were brought to europe from the Muslim World?
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Q: Public institutions of higher education in Charleston include the College of Charleston (the nation's 13th-oldest university), The Citadel, The Military College of South Carolina, and the Medical University of South Carolina. The city is also home to private universities, including the Charleston School of Law . Charleston is also home to the Roper Hospital School of Practical Nursing, and the city has a downtown satellite campus for the region's technical school, Trident Technical College. Charleston is also the location for the only college in the country that offers bachelor's degrees in the building arts, The American College of the Building Arts. The Art Institute of Charleston, located downtown on North Market Street, opened in 2007.

A: What is the nation's 13th-oldest university?
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Q: Within a few months of John's return, rebel barons in the north and east of England were organising resistance to his rule. John held a council in London in January 1215 to discuss potential reforms and sponsored discussions in Oxford between his agents and the rebels during the spring. John appears to have been playing for time until Pope Innocent III could send letters giving him explicit papal support. This was particularly important for John, as a way of pressuring the barons but also as a way of controlling Stephen Langton, the Archbishop of Canterbury. In the meantime, John began to recruit fresh mercenary forces from Poitou, although some were later sent back to avoid giving the impression that the king was escalating the conflict. John announced his intent to become a crusader, a move which gave him additional political protection under church law.

A:
Where did John hold a council in January 1215?
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