Deaf culture is prevalent in schools for the deaf. Most children born to deaf parents are hearing. The illness left her both deaf and blind. They also donated to a school for the deaf and blind. She played a deaf and mute girl. There are also tournaments for players with disabilities, such as wheelchair tennis and deaf tennis. Lebanese Sign Language is the language of the Deaf community. Jordanian Sign Language is the language of the deaf community. Bell worked extensively in medical research and invented techniques for teaching speech to the deaf. Omani Sign Language is the language of the deaf community. Qatari Sign Language is the language of the deaf community. One example of sign language variation in the Deaf community is Black ASL. She traveled to twenty-five different countries giving motivational speeches about Deaf people's conditions. Her pleas for an assignment in a war zone fall on deaf ears. Members of Deaf cultures communicate via sign languages.