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Please predict whether this patent is acceptable.PATENT ABSTRACT: A system, a machine-readable storage medium storing instructions, and a computer-implemented method are described herein are directed to a Candidate Engine. The Candidate Engine generates a key(s) based on respective shared attributes between first profile data of a first member account and second profile data of a second member account in a social network service, The Candidate Engine assembles, according to encoded rules of a prediction model, feature vector data for each key. The encoded rules comprises at least one pre-defined feature predictive of an affinity between the first member account and the second member account. The Candidate Engine processes, according to the prediction model, the feature vector data for each key. The Candidate Engine receives predictive output from the prediction model.