In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

How big was his family?, Context: Muammar Gaddafi was born in a tent near Qasr Abu Hadi, a rural area outside the town of Sirte in the deserts of western Libya. His family came from a small, relatively un-influential tribal group called the Qadhadhfa, who were Arabized Berber in heritage. His father, Mohammad Abdul Salam bin Hamed bin Mohammad, was known as Abu Meniar (died 1985), and his mother was named Aisha (died 1978); Abu Meniar earned a meager subsistence as a goat and camel herder. Nomadic Bedouins, they were illiterate and kept no birth records. As such, Gaddafi's date of birth is not known with certainty, and sources have set it in 1942 or in the spring of 1943, although biographers Blundy and Lycett noted that it could have been pre-1940. His parents' only surviving son, he had three older sisters. Gaddafi's upbringing in Bedouin culture influenced his personal tastes for the rest of his life. He repeatedly expressed a preference for the desert over the city and retreated to the desert to meditate.
His parents' only surviving son, he had three older sisters