In some NLP systems, queries are compared to different data sources stored in a corpus to provide an answer to the query. The single crystal according to the present invention is composed of a terbium aluminum garnet single crystal, and mainly a portion of the aluminum is replaced with lutetium. A head of a bolt is sandwiched between the first mudguard member and the second mudguard member. The data receptacles of a form are filled with data when the user executes a data population command.