92511
It is one of the two main ingredients of natrocarbonatite , found naturally in the lava of Ol Doinyo Lengai volcano , the other being nyerereite .
 Ol Doinyo Lengai
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Ol Doinyo Lengai