existing restrictions existing rights existing risk existing risks existing road existing roads existing roof existing route existing routes existing rule existing rules existing sample existing sanctions existing scheme existing schemes existing school existing schools existing scientific existing section existing security existing service existing services existing shareholders existing shares existing ships existing site existing sites existing situation existing skills existing small existing social existing software existing solar existing solution existing solutions existing sources existing space existing species existing staff existing standard existing standards existing state existing station existing stations existing statistics existing status existing stock existing stockpiles existing stocks existing storage existing strategies existing strategy existing strengths existing structure existing structures existing studies existing substances existing suppliers existing supply existing support existing surface existing surveillance existing surveys existing system existing systems existing table existing tax existing team existing teams existing techniques existing technologies existing technology existing teeth existing text existing theories existing theory existing things existing today existing tools existing tracks existing trade existing traditional existing traffic existing training existing transport existing treaties existing treatment existing treatments existing trees existing type existing types existing union existing units existing urban existing user existing users existing vegetation existing vehicle existing video