According to an embodiment of the present invention, a learning method is performed by an inference device and comprises: a step of calculating a correction probability based on a co-occurrence frequency of objects in prescribed content; a step of allowing an inference unit included in the inference device to learn based on first content for learning having an annotation about an included object; a step of inputting second content for learning without the annotation about an included object into the learned inference unit; a step of assigning or not assigning a result outputted by the learned inference unit as the annotation to the second content for learning, based on a result value obtained by combining the result outputted by the learned inference unit in response to an input of the second content for learning and the correction probability; and a step of allowing the learned inference unit to learn additionally, based on the second content for learning to which the annotation is assigned.;COPYRIGHT KIPO 2020
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