a man scratching his head from The Evening Ledger-Philadelphia, May 4 1916<br/>頭部刮擦<br/>annual training 2018、Cartoonie、confused、Good Old Stuff、head、man、worried、worry<br/>2018年度培訓、動畫片、困惑、好老東西、頭、人、擔心、擔心<br/>資料來源：openclipart ( https://openclipart.org/ )