In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Ex Input:
What is the "both" which are bound from Sofala?, Context: The Swahili built Mombasa into a major port city and established trade links with other nearby city-states, as well as commercial centres in Persia, Arabia, and even India. By the 15th-century, Portuguese voyager Duarte Barbosa claimed that "Mombasa is a place of great traffic and has a good harbour in which there are always moored small craft of many kinds and also great ships, both of which are bound from Sofala and others which come from Cambay and Melinde and others which sail to the island of Zanzibar."

Ex Output:
small craft of many kinds and also great ships

Ex Input:
What is needed to prove the theory?, Context: In the early 11th century, the Muslim physicist Ibn al-Haytham (Alhacen or Alhazen) discussed space perception and its epistemological implications in his Book of Optics (1021), he also rejected Aristotle's definition of topos (Physics IV) by way of geometric demonstrations and defined place as a mathematical spatial extension. His experimental proof of the intromission model of vision led to changes in the understanding of the visual perception of space, contrary to the previous emission theory of vision supported by Euclid and Ptolemy. In "tying the visual perception of space to prior bodily experience, Alhacen unequivocally rejected the intuitiveness of spatial perception and, therefore, the autonomy of vision. Without tangible notions of distance and size for correlation, sight can tell us next to nothing about such things."

Ex Output:
vision

Ex Input:
Where is the belt in a traditional ladder match?, Context: Many modern specialty matches have been devised, with unique winning conditions. The most common of these is the ladder match. In the basic ladder match, the wrestlers or teams of wrestlers must climb a ladder to obtain a prize that is hoisted above the ring. The key to winning this match is that the wrestler or team of wrestlers must try to incapacitate each other long enough for one wrestler to climb the ladder and secure that prize for their team. As a result, the ladder can be used as a weapon. The prizes include but are not limited to any given championship belt (the traditional prize), a document granting the winner the right to a future title shot, or any document that matters to the wrestlers involved in the match (such as one granting the winner a cash prize). Another common specialty match is known as the battle royal. In a battle royal, all the wrestlers enter the ring to the point that there are 20-30 wrestlers in the ring at one time. When the match begins, the simple objective is to throw the opponent over the top rope and out of the ring with both feet on the floor in order to eliminate that opponent. The last wrestler standing is declared the winner. A variant on this type of match is the WWE's Royal Rumble where two wrestlers enter the ring to start the match and other wrestlers follow in 90 second intervals (previously 2 minutes) until 30-40 wrestlers have entered the ring. All other rules stay the same. For more match types, see Professional wrestling match types.

Ex Output:
hoisted above the ring