 One of her more pioneering and innovative charitable causes was the oral instruction of what were then called the deaf and dumb . 
 One of her more pioneering and innovative charitable causes was the oral instruction of what <a href='uninflect' title='1'><mark>were</mark></a> then called the deaf and dumb . 
One of her more pioneering and innovative charitable causes was the oral instruction of wht was then called the deaf and dum .