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Some mountains ranges ( such as the Ahaggar , Tassili n'Ajjer , Tibesti and Aïr ) rise up from the desert and receive more rainfall and mostly present slightly cooler summer temperatures .
 Ahaggar, Tassili n'Ajjer, Tibesti, Aïr
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ahaggar, Tassili n'Ajjer, Tibesti, Aïr