8171
Before the early 1840 s , the cane toad had been introduced into Martinique and Barbados , from French Guiana and Guyana .
 Martinique, Barbados, French Guiana, Guyana
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Martinique, Barbados, French Guiana, Guyana