28471
Echiochileae are retrieved as sister to the remainder of Boraginaceae s . str . , which , in turn , fall into two major clades , the Boragineae - Lithospermeae ( in a well - supported sister relationship ) and the Cynoglosseae s . l .
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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:
 None