「先生帽子が落ちました」
translation
"Teacher's hat fell off."
kanji (pronunciations & definitions)
先生: teacher (せんせい), instructor, master, sensei, title or form of address for a teacher, master, doctor, lawyer, etc. | 帽子: hat (ぼうし), cap | 帽子: hat (ぼうし), cap | 落: slip (おち), slip (オチ), omission, omission, upshot |