7091
High - resolution solid - state 13C NMR spectroscopy of the paramagnetic metal - organic frameworks , STAM - 1 and HKUST - 1 .
 Chemical: 13C
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: 13C