130649
It states that if the three intersection points of the three pairs of lines through opposite sides of a hexagon lie on a line L , then the six vertices of the hexagon lie on a conic C ; the conic may be degenerate , as in Pappus 's theorem . .
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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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