2625
Given both the large proportion of non - Jewish carriers with this allele and that standard biochemical screening cannot differentiate between heterozygotes for the C739 - to - T mutations and Tay - Sachs disease carriers , DNA testing for this mutation in at - risk couples is essential .
 Disease: Tay - Sachs disease
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
 Entities: Tay - Sachs disease 
Answer:
 Disease: Tay - Sachs disease