You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Buddhism

Context:
Sentient beings always suffer throughout saṃsāra until they free themselves from this suffering (dukkha) by attaining Nirvana. Then the absence of the first Nidāna—ignorance—leads to the absence of the others.

Question:
What is suffering also called?

dukkha