A magnesium based alloy consists of, by weight: 1. According to log information for each of the types of the inputted information, analysis is executed for the inputted information for each of the types. A filter is applied to the information to determine if the loan consumer meets a set of loan criteria. An extracting solution is poured into the material to be extracted that is filled through the portion cut and torn away from the head portions or onto the material to be extraction that has been contained therein, thereby to safely conduct the extraction.