Assertion: dean's friend | /r/HasProperty | seamus finnigan
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Source sentences:
text: He commented that Harry and Ron were lucky to get the prettiest girls in the year as their dates, twin sisters Parvati and Padma Patil; it is unknown who Dean attended the dance with, as his best friend Seamus Finnigan was going with Lavender Brown and Neville was going with Ginny Weasley.