4725
In addition , none of the investigated chelators binds ( 68 ) Ge , rendering post - labeling purification protocols , for example , solid - phase extraction , a reliable means of removal of ( 68 ) Ge contamination from ( 68 ) Ga radiopharmaceuticals .
 Chemical: ( 68 ) Ge; Chemical: ( 68 ) Ge; Chemical: ( 68 ) Ga
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: ( 68 ) Ge; Chemical: ( 68 ) Ge; Chemical: ( 68 ) Ga