71
At the very high dose levels used , sodium saccharin and sodium cyclamate were weak solitary carcinogens producing 4 / 253 and 3 / 228 bladder tumours respectively , and the first of these tumours did not appear for more than 80 weeks .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None