Assertion: knight's form | /r/HasProperty | documented in english
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Source sentences:
text: The form 'Sir' is first documented in English in 1297, as title of honour of a knight, and latterly a baronet, being a variant of sire, which was already used in English since at least c.1205 as a title placed before a name and denoting knighthood, and to address the (male) Sovereign since c.1225, with additional general senses of 'father, male parent' is from c.1250, and 'important elderly man' from 1362.