23300
The statistical approach is based on the percolation theory with Monte Carlo methods and is examined by applying it to the experimental results of three solid samples having unique hydrogen arrangement for 1 - 3 dimensions : the n - alkane / d - urea inclusion complex as a one - dimensional ( 1D ) system , whose ( 1 ) H nuclei align approximately in 1D , and magnesium hydroxide and adamantane as a two - dimensional ( 2D ) and a three - dimensional ( 3D ) system , respectively .
 Chemical: hydrogen; Chemical: n - alkane; Chemical: d - urea; Chemical: ( 1 ) H; Chemical: magnesium hydroxide; Chemical: adamantane
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: hydrogen; Chemical: n - alkane; Chemical: d - urea; Chemical: ( 1 ) H; Chemical: magnesium hydroxide; Chemical: adamantane