The present invention relates to a method of easing childbirth using a composition having a lubricant effect for use in particular during human vaginal delivery. An assignment of an occurrence of a term within a document to an ontological node is received based on usage of the occurrence of the term within the document. The drive chuck includes a circular ring of drive chuck teeth and an alignment feature. A position selective material surface melting device is configured to act on individual protrusions when the support table is operable in the apparatus, such that localized areas of an upper surface of the protrusion are melted and subsequently allowed to cool, thereby causing the localized areas to be raised with respect to the upper surface of the protrusion. If there is a high probability of signal saturation, the detection data based on the signals in the intermediate stages are selected, and the level of the selected data is corrected.