Sentence:  The doctor , with the air of a man whose professional interests have found scope , drew <WSD>Alex</WSD> 's attention to those excellences which might otherwise have escaped him : the fine color in comb and wattles , the length and quality of neck and saddle hackles , the firm , wide spread of the toes , and a rare justness in the formation of the ear lappets . 
Meaning of the word marked with <WSD> tags:  a human being