13.Meanwhile Captain Nemo had called a halt. My companions and I stopped walking, and turning around, I saw the crewmen form a semicircle around their leader.
16.The village contained an impressive monument: seven half-tonne stones standing in a semicircle around a spring, that might have been used for ceremonial purposes.
18.Because her growth in a bungalow with a semicircle roof was a miserable experience, she had determined to struggle against prejudice and injustice since childhood.