1614
We examined the contribution of a cryptic plasmid , pRmeGR4b , to the nodulation of Medicago sativa by strain GR4 of Rhizobium meliloti .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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