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Equipment problems and mechanical failure forced a recovery expedition to give up efforts to retrieve a giant slab of the RMS Titanic from the ocean floor , a spokeswoman said on Friday .
 else: RMS Titanic
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 else: RMS Titanic