in discover i have details as follows
Name Age City Diseases
Raj 25 Chennai Myopia
Ravi 35 Chennai Glaucoma
Ram 48 Chennai catract
Sam 49 Chennai Eye pain
Ajay 50 Chennai uveitis
Raj 45 Mumbai uveitis
Ravi 35 Mumbai Glaucoma
Ram 40 Mumbai Eye pain
Sam 80 Mumbai Catract
Ajay 70 Mumbai Myopia
i want to search only city chennai
for that how to do in elastic search
please let me know