You will be given a definition of a task first, then some input of the task.
This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Passage: From his bed he participated in Sunday Mass at 18:00. After communion, the pope suffered a massive heart attack, after which he continued to live for three hours. On 6 August 1978 at 21:41 Paul VI died in Castel Gandolfo. According to his will, he was buried in the grottos of the Vatican not in an ornate tomb, but in a grave in the ground. He is buried beneath the floor of Saint Peter's Basilica with other popes. In his will, he requested to be buried in the "true earth" and therefore, he does not have an ornate sarcophagus but an in-ground grave. Question: How long did Paul VI live for after experiencing a massive heart attack in 1978?
Output:
three hours