Passage: Performance-enhancing substances, also known as performance-enhancing drugs (PED), are substances that are used to improve any form of activity performance in humans. A well-known example involves doping in sport, where banned physical performance -- enhancing drugs are used by athletes and bodybuilders. Athletic performance-enhancing substances are sometimes referred to as ergogenic aids. Cognitive performance-enhancing drugs, commonly called nootropics, are sometimes used by students to improve academic performance. Performance-enhancing substances are also used by military personnel to enhance combat performance.

Question: Based on this passage, what is the definition of performance enhancing drugs? Let's do a good job answering this.
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Stream of consciousness: This is the relevant information: Performance-enhancing substances, also known as performance-enhancing drugs (PED), are substances that are used to improve any form of activity performance in humans.... The answer is substances that are used to improve any form of activity performance in humans.

The U.S. Constitution also provides for appointment of one of the elected Senators to serve as President pro tempore. This Senator presides when the vice president was absent from the body. The President pro tempore is selected by the body specifically for the role of presiding in the absence of (as the meaning of pro tempore, literally "for the time being") the actual presiding officer. By tradition, the title of President pro tempore has come to be given more-or-less automatically to the most senior senator of the majority party. In actual practice in the modern Senate, the President pro tempore also does not often serve in the role (though it is his or her constitutional right to do so), instead, as governed by the aforementioned Rule I, he or she frequently designates a junior senator to perform the function.

Answer this question based on the passage: who is the backup leader of the senate? Let's do a good job answering this.
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Stream of consciousness: The relevant information is: The President pro tempore is selected by the body specifically for the role of presiding in the absence of (as the meaning of pro tempore, literally "for the time being") the actual presiding officer.... The answer is The President pro tempore.

"I Like the Sound of That" is a song by American country music group Rascal Flatts. It was released in August 2015 as the fourth and final single from their album Rewind. The song was written by Jesse Frasure along with American singer Meghan Trainor and Shay Mooney of the American country music duo Dan + Shay.

Answer this question based on the passage: who wrote the song i like the sound of that? Let's do a good job answering this.
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Stream of consciousness: The important part for answering this question is: The song was written by Jesse Frasure along with American singer Meghan Trainor and Shay Mooney of the American country music duo Dan + Shay.... The answer is Jesse Frasure along with American singer Meghan Trainor and Shay Mooney of the American country music duo Dan + Shay.