5066
In this regard , the term was coined in the later 20th century in order to retrospectively describe a type of relationship which until the mid-19 th century had been considered unremarkable but since the second half of the 19th century had become rarer as physical intimacy between non-sexual partners came to be regarded with anxiety .
 disease: anxiety
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 disease: anxiety