52109
A day , in the sense of daytime that is distinguished from night time , is commonly defined as the period during which sunlight directly reaches the ground , assuming that there are no local obstacles .
 night time
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:
 night time