Problem: The island covers an area of 25 square kilometres (2,500 ha). The eastern side is wetter than the western. Although the climate is essentially arid, the rainfall does average 1000 mm annually, but with considerable variation over the terrain. Summer is from May to November, which is also the rainy season. Winter from December to April is the dry season. Sunshine is very prominent for nearly the entire year and even during the rainy season. Humidity, however, is not very high due to the winds. The average temperature is around 25 C with day temperatures rising to 32 C. The average high and low temperatures in January are 28 C and 22 C, respectively, while in July they are 30 C and 24 C. The lowest night temperature recorded is 13 C. The Caribbean sea waters in the vicinity generally maintain a temperature of about 27 C.
How much rainfall falls each year on average during the rainy season?
---
Answer: unanswerable

Problem: International teams also play friendlies, generally in preparation for the qualifying or final stages of major tournaments. This is essential, since national squads generally have much less time together in which to prepare. The biggest difference between friendlies at the club and international levels is that international friendlies mostly take place during club league seasons, not between them. This has on occasion led to disagreement between national associations and clubs as to the availability of players, who could become injured or fatigued in a friendly.
What do international leagues' friendlies happen in the middle of?
---
Answer: club league seasons

Problem: The set G is called the underlying set of the group (G, ). Often the group's underlying set G is used as a short name for the group (G, ). Along the same lines, shorthand expressions such as "a subset of the group G" or "an element of group G" are used when what is actually meant is "a subset of the underlying set G of the group (G, )" or "an element of the underlying set G of the group (G, )". Usually, it is clear from the context whether a symbol like G refers to a group or to an underlying set.
A subset of the underlying set G of the group (G) cannot be written using what kind of expression?
---
Answer:
unanswerable