user: How can I get from San Francisco airport to downtown San Francisco?

assistant: To travel from San Francisco airport to downtown San Francisco, there are multiple different options. You can travel by car or rideshare which normally takes around 20-60 minutes depending on traffic. Another option is to take public transit using BART which has a direct link inside the airport. This can take up to an hour depending on the time of day and weather.

user: Extract the reason why the check clearing system was created

assistant: During financial crises in early 20th century, some banks refused to clear checks drawn on certain other banks, a practice that contributed to the failure of otherwise solvent banks, which ultimately led to severe crises that swept the nation, therefore Congress gave the Federal Reserve System the authority to establish a nationwide check-clearing system to address such systematic issues.

user: Generate word problem on ratios suitable for grade 10

assistant: An aquarium has a total of 120 animals, out of which 40 are amphibians and the rest are fish. What is the ratio of amphibians to the total number of animals in the aquarium?