The task is about reading the given story and question, then finding an answer to the given question. Based on the passage provided and the given question, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
One example is below.
Q: story : Honolulu is the capital and largest city of the U.S. state of Hawaii. It is an unincorporated part of and the county seat of the City and County of Honolulu on the island of Oahu. The city is the main gateway to Hawaii and a major portal into the United States. The city is also a major hub for international business, military defense, as well as famously being host to a diverse variety of east-west and Pacific culture, cuisine, and traditions. 

Honolulu is the most remote city of its size in the world and is the westernmost major U.S. city. For statistical purposes, the U.S. Census Bureau recognizes the approximate area commonly referred to as "City of Honolulu" (not to be confused with the "City and County") as a census county division (CCD). Honolulu is a major financial center of the islands and of the Pacific Ocean. The population of the city of Honolulu was 337,256 as of the 2010 census, while the Honolulu CCD was 390,738 and the population of the consolidated city and county was 953,207. 

"Honolulu" means "sheltered harbor" or "calm port". The old name is said to be Kou, a district roughly encompassing the area from Nuuanu Avenue to Alakea Street and from Hotel Street to Queen Street which is the heart of the present downtown district. The city has been the capital of the Hawaiian Islands since 1845 and gained historical recognition following the attack on Pearl Harbor by Japan near the city on December 7, 1941. question: What does Honolulu mean?
A: sheltered harbor
Rationale: This answer for the given question is based on the following sentence from the passage - "Honolulu" means "sheltered harbor" or "calm port" and this is answerable from the passage. So, it is a good answer.
Q: story: CHAPTER XX—LANDING ON CAVE ISLAND 

At the end of a week Dave was more worried than ever. Each day he and his chums went down to the shipping offices and each day returned to the hotel disappointed. Not a word had been heard concerning the missing vessel and those on board. 

The _Golden Eagle_ was all ready to sail on her return trip to the United States, but Phil told Captain Sanders to wait. 

“Perhaps we’ll hear to-day,” he said, and this was repeated day after day. 

It was very warm and the boys were glad they had brought along some thin clothing. They scarcely knew what to do with themselves, and Dave was particularly sober. 

“I suppose Mr. Wadsworth and the rest are waiting to hear from me,” he said to his chums. “But what is the use of sending a message when I haven’t anything to say?” 

Another Sunday passed, and on Monday the boys visited the _Golden Eagle_, and then went with Captain Sanders to the nearest shipping office. 

“Something is going on!” cried the senator’s son, as he noticed an unusual crowd congregated. “Must be news of some sort.” 

“Let us find out what it is!” returned our hero, quickly. 

“The _Emma Brower_ has been heard from,” said a man, standing near. “That’s the vessel that was missing, don’t you know,” he added. 

“What of her?” asked Dave. 

“Went down in that terrible storm we had about ten days ago.” 

“Down!” gasped all of the boys, while Captain Sanders looked the concern he felt. , question: what was he worried about?
A:
A missing vessel