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:
Warsaw

Context:
Tamara de Lempicka was a famous artist born in Warsaw. She was born Maria Górska in Warsaw to wealthy parents and in 1916 married a Polish lawyer Tadeusz Łempicki. Better than anyone else she represented the Art Deco style in painting and art. Nathan Alterman, the Israeli poet, was born in Warsaw, as was Moshe Vilenski, the Israeli composer, lyricist, and pianist, who studied music at the Warsaw Conservatory. Warsaw was the beloved city of Isaac Bashevis Singer, which he described in many of his novels: Warsaw has just now been destroyed. No one will ever see the Warsaw I knew. Let me just write about it. Let this Warsaw not disappear forever, he commented.

Question:
What profession was Nathan Alterman?

poet