Well,
There are none if none of the words in the original question begin with a capital letter.
None In that sentence there are no proper nouns proper nouns are places, names, etc. There are no proper nouns in that sentence a proper noun is places,names,etc.
There is 1 proper noun in the sentence: "Grandma." Proper nouns are specific names and are capitalized, while common nouns refer to general things. In this case, "Grandma" is the only proper noun present.
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