## question
Mary William Ethelbert Appleton "Billie" Burke (August 7, 1884 -- May 14, 1970) was an American actress who was famous on Broadway, in early silent film, and subsequently in sound film. She is best known to modern audiences as Glinda the Good Witch of the North in the movie musical The Wizard of Oz (1939), which starred Judy Garland.

Answer this question: who played glinda the good witch in the wizard of oz?
## answer
The relevant information is: She is best known to modern audiences as Glinda the Good Witch of the North in the movie musical The Wizard of Oz (1939), which starred Judy Garland.
So the answer must be '' Billie '' Burke

## question
The Near Eastern or Biblical cubit is usually estimated as approximately 457 mm (18 in). Epiphanius of Salamis, in his treatise On Weights and Measures, describes how it was customary, in his day, to take the measurement of the biblical cubit: "The cubit is a measure, but it is taken from the measure of the forearm. For the part from the elbow to the wrist and the palm of the hand is called the cubit, the middle finger of the cubit measure being also extended at the same time and there being added below (it) the span, that is, of the hand, taken all together."

What is the measurement of a cubit in the bible?
## answer
To answer this question, we should know that: The Near Eastern or Biblical cubit is usually estimated as approximately 457 mm (18 in).
So the answer must be approximately 457 mm ( 18 in )

## question
The number of protons within the atom's nucleus is called atomic number and is equal to the number of electrons in the neutral (non-ionized) atom. Each atomic number identifies a specific element, but not the isotope; an atom of a given element may have a wide range in its number of neutrons. The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number.

Based on this passage, the main difference between isotopes of the same element?
## answer
The relevant sentence in the passage is: Each atomic number identifies a specific element, but not the isotope; an atom of a given element may have a wide range in its number of neutrons.
So the answer must be number of neutrons

## question
"Year of the Cat" is a single by Scottish singer-songwriter Al Stewart, released in July 1976. The song is the title track of his 1976 album Year of the Cat, and was recorded at Abbey Road Studios, London in January 1976 by engineer Alan Parsons. The song reached # 8 on the Billboard Hot 100 in March 1977. Although Stewart's highest charting single on that chart was 1978's "Time Passages", "Year of the Cat" has remained Stewart's signature recording, receiving regular airplay on both classic rock and folk rock stations.

Answer this question based on the passage: who sang the song the year of the cat?
## answer
The relevant information is: "Year of the Cat" is a single by Scottish singer-songwriter Al Stewart, released in July 1976.
So the answer must be Al Stewart