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:
Josip_Broz_Tito

Context:
Tito carried on numerous affairs and was married several times. In 1918 he was brought to Omsk, Russia, as a prisoner of war. There he met Pelagija Belousova who was then thirteen; he married her a year later, and she moved with him to Yugoslavia. Pelagija bore him five children but only their son Žarko Leon (born 4 February, 1924) survived. When Tito was jailed in 1928, she returned to Russia. After the divorce in 1936 she later remarried.

Question:
How old was Pelagija Belousava when Tito met her?

thirteen