A light, compact and low-cost liquid fuel reformer for removing the harmful substances within the exhaust gas discharged from vehicles having two magnet holding cases accommodating respectively anisotropic metallic materials. A document retrieval unit retrieves a document fulfilling a retrieval condition, and, for condition items of the retrieval condition, specifies such item. A gear reduction effects a reduction in the speed of the fan relative to an input speed from a fan drive turbine rotor.