Problem: Edmond (or Edmund) Halley, FRS (pronounced ; 8 November [O.S. 29 October] 1656 25 January 1742 [O.S. 14 January 1741] ) was an English astronomer, geophysicist, mathematician, meteorologist, and physicist who is best known for computing the orbit of Halley's Comet. He was the second Astronomer Royal in Britain, succeeding John Flamsteed.

Based on the paragraph above can we conclude that "There was only one astronomer before him in the ARB"?

A: Yes

Problem: Robert Levet (17051782), a Yorkshireman who became a Parisian waiter, then garnered some training as an apothecary and moved to London, was eulogised by the poet Samuel Johnson, with whom Levet shared a friendship of thirty-six years, in Johnson's poem "On the Death of Dr. Robert Levet."

Based on the paragraph above can we conclude that "Robert Levet was the only person Samuel Johnson wrote a poem about"?

A: It's impossible to say

Problem: The Black Taj Mahal ("Black Taj", "Kaala Taj", also "the 2nd Taj") is a legendary black marble mausoleum that is said to have been planned to be built across the Yamuna River opposite the Taj Mahal in Agra, Uttar Pradesh, India. Mughal emperor Shah Jahan is said to have desired a mausoleum for himself similar to that of the one he had built in memory of his third wife, Mumtaz Mahal.

Based on the paragraph above can we conclude that "Shah Jahan did not marry after his third wife."?

A:
It's impossible to say