209336
This object emits a burst of light at regular intervals of 25.34 days , possibly caused by repeated close approaches between the two component stars which are gravitationally linked in an eccentric orbit - the flashes may be the result of large amounts of matter falling into the growing protostars .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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