Problem:Acer / esr / is a genus of trees or shrubs commonly known as maple. The genus is placed in the Sapindaceae family. There are approximately 128 species, most of which are native to Asia, with a number also appearing in Europe, northern Africa, and North America. Only one species, Acer laurinum, extends to the Southern Hemisphere. The type species of the genus is the sycamore maple, Acer pseudoplatanus, the most common maple species in Europe.

Based on this passage, how many kinds of maple trees are there?
Solution:OK... The relevant information to answer the above question is: There are approximately 128 species, most of which are native to Asia, with a number also appearing in Europe, northern Africa, and North America.
128 species.

Problem:Context: Christine Michelle Metz (born September 29, 1980) is an American actress and singer. She is known for playing Kate Pearson in the NBC drama This Is Us, for which she has earned Best Supporting Actress nominations at the Primetime Emmy Awards (2017) and Golden Globe Awards (2017 and 2018).

Question: who is the actress that plays kate on this is us?
Solution:OK... The relevant information to answer the above question is: She is known for playing Kate Pearson in the NBC drama This Is Us, for which she has earned Best Supporting Actress nominations at the Primetime Emmy Awards (2017) and Golden Globe Awards (2017 and 2018).
Christine Michelle Metz.

Problem:Context: Since the Supreme Court was established in 1789, 17 persons have served as chief justice. The first was John Jay (1789 -- 1795). The current chief justice is John Roberts (since 2005). Four -- Edward Douglass White, Charles Evans Hughes, Harlan Fiske Stone, and William Rehnquist -- were previously confirmed for associate justice and subsequently confirmed for chief justice separately.

Question: who is the chief justice of the united states supreme court?
Solution:
OK... The relevant sentence in the passage is: The current chief justice is John Roberts (since 2005).
John Roberts.