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Called an internal telephone number at our business, and a woman said she is with "Cornerstone Senior Services" and asking for David.  I told her she has the wrong number.  That telephone number does not go to Cornerstone Senior Services.  There is a Cornerstone Senior Services in Glenville, IL (an insurance brokerage) according to Google - but this number does not correspond with them, that I can see.  The number might belong to a work-from-home lead generator hired by them, who knows.  I am guessing this might have been a telemarketing call.