Sentence 1: "Mark was close to Mr. Singer's heels. He heard him calling for the captain, promising him, in the jargon everyone talked that night, that not one thing should be damaged on the ship except only the ammunition, but the captain and all his crew had best stay in the cabin until the work was over."

 Sentence 2: "He heard Mark calling for the captain."

Is sentence 2 true, based on sentence 1?
Choose your answer from: -no -yes
no