The company Ancestry, which helps people trace their genealogy, has found evidence that Swift is distantly related to the famed poet Emily Dickinson.
ancestryとgenealogy（系図，系譜）が同内容語。同一語の繰り返しを避ける。
Swift explained that the lyrics she writes fall under three genre categories: quill lyrics, fountain pen lyrics and glitter gel pen lyrics, which reference the writing instrument she imagines she would have been holding while penning the lyrics.
explainのthat節補文。
