user: How does the sun sustain life on earth?

assistant: The sun is what sustains life on earth.  It provides the light needed for plants to grow through photosynthesis.  It is a main source of Vitamin D for humans, and it is a source of energy we can capture on earth and convert into usable electricity through the use of solar panels.  It is what causes weather and climate changes on the earth.  Animals and plants are completely dependent on the sun because it creates the food we need to survive.

user: Where was the first capital of Alaska?

assistant: Alaska's first capital was in Sitka, following the transfer of the Alaska territory from Russia to the United States in 1867, and remained the capital until 1906 when it transferred to Juneau.

user: Is Arsenal the most successful Soccer team in England?

assistant: Arsenal FC was the first club in the south of england to join the football league in 1893.   They have been only relegated once in 1913 and completed the 20th century with the highest average position so over time, yes, you can say they have been the most successful.