TASK DEFINITION: In this task, you are given a sentence and question which can be answered using the sentence. Your task is to answer the question using the information from the sentence. The answer to the question is unique and it is a continuous text span from the sentence.
PROBLEM: Sentence: The `` power cepstrum '' was defined in a 1963 paper by Bogert et al. . 
 Question: when was something defined?

SOLUTION: 1963

PROBLEM: Sentence: The facades were covered with fresh multicolor paintwork , greatly enhancing the external appearance of the buildings . 
 Question: what was  enhanced?

SOLUTION: the external appearance of the buildings

PROBLEM: Sentence: St John appears to have got into trouble with the court in connection with a seditious publication , and to have associated himself with the future popular leaders John Pym and Lord Saye . 
 Question: how has someone appear?

SOLUTION:
to have got into trouble with the court in connection with a seditious publication , and to have associated himself with the future popular leaders John Pym and Lord Saye