1. An information processing device, comprising: a memory; and a processor coupled to the memory, wherein the processor executes a process comprising: selecting nodes associated with an extracted node and a node associated with the node accepted by an acceptance unit accepting a node from nodes included in a node link obtained from text relating to a specific matter, accepting a first item in which a registered content of an analysis target is registered, from items in a table relating to the specific matter, and accepting the registered content of the analysis target, a second item for use in calculating degrees of association between registered contents in the first item in the table and nodes; calculating the degrees of association between each of the registered content in the first item in the table and the nodes selected, according to a registered content in the second item in the table; and extracting a node associated with the analysis target from the selected nodes, according to the calculated degrees of association.