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

[Q]: What is a prerequisite for weight to play a factor in conductivity?, Context: While inert gas reduces filament evaporation, it also conducts heat from the filament, thereby cooling the filament and reducing efficiency. At constant pressure and temperature, the thermal conductivity of a gas depends upon the molecular weight of the gas and the cross sectional area of the gas molecules. Higher molecular weight gasses have lower thermal conductivity, because both the molecular weight is higher and also the cross sectional area is higher. Xenon gas improves efficiency because of its high molecular weight, but is also more expensive, so its use is limited to smaller lamps.
[A]: constant pressure and temperature


[Q]: 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."
[A]: small craft of many kinds and also great ships


[Q]: Which is the only company out of the three mentioned that does not have the word "film" in its name?, Context: It is the world's fourth oldest major film studio, after the renowned French studios Gaumont Film Company and Pathé, and the Danish Nordisk Film company.
[A]:
Pathé