Question: Extract the answer to the question from the following context. Question: What century did Prime Minister Theresa May serve in? Context: The term prime minister in the sense that we know it originated in the 18th century in the United Kingdom when members of parliament disparagingly used the title in reference to Sir Robert Walpole. Over time, the title became honorific and remains so in the 21st century.
Answer: 21st

Question: Extract the answer to the question from the following context. Question: The listener can discern changes in what part of a tone Context: The just-noticeable difference (jnd) (the threshold at which a change is perceived) depends on the tone's frequency content. Below 500 Hz, the jnd is about 3 Hz for sine waves, and 1 Hz for complex tones; above 1000 Hz, the jnd for sine waves is about 0.6% (about 10 cents). The jnd is typically tested by playing two tones in quick succession with the listener asked if there was a difference in their pitches. The jnd becomes smaller if the two tones are played simultaneously as the listener is then able to discern beat frequencies. The total number of perceptible pitch steps in the range of human hearing is about 1,400; the total number of notes in the equal-tempered scale, from 16 to 16,000 Hz, is 120.
Answer: pitches

Question: Extract the answer to the question from the following context. Question: Who came before the Maratha kingdom? Context: The post-Mughal era was dominated by the rise of the Maratha suzerainty as other small regional states (mostly late Mughal tributary states) emerged, and also by the increasing activities of European powers. There is no doubt that the single most important power to emerge in the long twilight of the Mughal dynasty was the Maratha confederacy. The Maratha kingdom was founded and consolidated by Chatrapati Shivaji, a Maratha aristocrat of the Bhonsle clan who was determined to establish Hindavi Swarajya. Sir J.N. Sarkar described Shivaji as "the last great constructive genius and nation builder that the Hindu race has produced". However, the credit for making the Marathas formidable power nationally goes to Peshwa Bajirao I. Historian K.K. Datta wrote about Bajirao I:
Answer:
Mughal dynasty