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Alexandre Edouard Baudrimont was a 19th-century French professor of chemistry who published various books connected to the sciences , languages and the Basque Country ( in particular Erromintxela ) : In the field of science he is best known for first preparation of Na3P in the mid-19th century by reacting molten sodium with phosphorus pentachloride .
 Alexandre, Baudrimont, Basque Country
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 Alexandre, Baudrimont, Basque Country