Ключевые слова: 1415, 1416 years old, 1516, american, casual, caucasian, cellphone, cellphone app, city street, communication, european, female, french, friend, friendship, german, girl, girlfriends, internet, leisure, lifestyle, message, mobile, mobile phone, outdoor, outdoors, outside, park, people, phone, russian, sitting, smart, smartphone, summer, technology, teenager, texting, together, two, urban, using, using smartphone, web, young, youth,