An electrophoresis chip is formed of a pair of transparent base plates. The primary channel bank is provided, and one or more secondary channel banks are connected to the primary channel bank through the stackplane first traffic mode and second traffic mode links. The extraction rule generation unit performs machine learning based on the feature vectors within a cluster for each cluster, and generates extraction rules to extract words having specific meanings. A hydrophobic angiotensin I-converting enzyme inhibitor such as ramipril can also be used for the oral treatment of persistent pulmonary hypertension of the newborn.