29924
Collectively , these results robustly resolved many deep and relatively shallow clades within Ambystoma , including the placement of A . gracile and A . talpoideum as the sister clade to a clade containing all remaining ambystomatids , and the placement of A . maculatum as the sister lineage to all remaining ambystomatids excluding A . gracile and A . talpoideum .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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