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:
Guinea-Bissau

Context:
Independence was unilaterally declared on 24 September 1973. Recognition became universal following the 25 April 1974 socialist-inspired military coup in Portugal, which overthrew Lisbon's Estado Novo regime.

Question:
What event caused the recognition to be universal?

socialist-inspired military coup