Passage: Profitability index (PI), also known as profit investment ratio (PIR) and value investment ratio (VIR), is the ratio of payoff to investment of a proposed project. It is a useful tool for ranking projects because it allows you to quantify the amount of value created per unit of investment.

Question: Based on this passage, the profitability index of an investment project is the ratio of the? Let's do a good job answering this.
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Stream of consciousness: To answer the above question, the relevant sentence is: Profitability index (PI), also known as profit investment ratio (PIR) and value investment ratio (VIR), is the ratio of payoff to investment of a proposed project.... The answer is payoff to investment.


Passage: This is a list of the schools in Division II of the National Collegiate Athletic Association (NCAA) in the United States and Canada that have football as a varsity sport. In the 2017 season, there are a total of 169 Division II football programs.

Question: Based on this passage, how many teams are in division 2 football? Let's do a good job answering this.
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Stream of consciousness: This is the relevant information: In the 2017 season, there are a total of 169 Division II football programs.... The answer is 169.


Context: "Red Sails in the Sunset" is a popular song. Published in 1935, its music was written by Hugh Williams (pseudonym for Wilhelm Grosz) with lyrics by prolific songwriter Jimmy Kennedy. The song was inspired by the "red sails" of Kitty of Coleraine, a yacht Kennedy often saw off the northern coast of Ireland and by his adopted town Portstewart, a seaside resort in County Londonderry.

Question: who wrote the song red sails in the sunset? Let's do a good job answering this.
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Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Stream of consciousness: To answer this question, we should know that: Published in 1935, its music was written by Hugh Williams (pseudonym for Wilhelm Grosz) with lyrics by prolific songwriter Jimmy Kennedy.... The answer is music was written by Hugh Williams ( pseudonym for Wilhelm Grosz ) with lyrics by prolific songwriter Jimmy Kennedy.