彼女はエッセイでそのテーマについて書きました

彼女: she, her, girlfriend, sweetheart
は: a, the, is, am, are, will
エッセイ: essay
で: in, at, on, with, by, over, through
その: the, that, its, those
テーマ: theme, subject, topic, themed, thematic
に: in, to, on, at, into, upon
つい: about, just, quite, accidentally, eventually, inevitably, inadvertently, unconsciously, unintentionally
て: the, it, have
書き: write, writing, write down
ます: will, to be, i will, to make, to do, to have
た: the, was, ta, da, other