1958
The column densities of frozen molecular hydrogen and methanol are inferred to be about 2 . 5 x 10 ( 18 ) and 3 . 0 x 10 ( 19 ) , respectively .
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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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