V3 <- c( "[ANONYMOUS], 2010, COMMUNICATION." , " [ANONYMOUS], 2008, END UNLAWFUL ATTACKS." , " (1986) ACTIVE MEASURES, , U.S. DEPARTMENT OF STATE, AUGUST 1986" , "(1900) NEW YORK TIMES, P. 17. , 22 APRIL" )
allstacked2 <- data.frame ( V3)
allstacked2$V3 <- gsub( "^[[:space:]]*(\\ (\\ d{4}\\ )|\\ [ANONYMOUS],)[[:space:]]*" , "" , allstacked2$V3)
allstacked2$V3 <- gsub( "[[:space:]]+" , " " , allstacked2$V3)
allstacked2
VjMgPC0gYygiW0FOT05ZTU9VU10sIDIwMTAsIENPTU1VTklDQVRJT04uIiwgIiAgICBbQU5PTllNT1VTXSwgMjAwOCwgRU5EIFVOTEFXRlVMIEFUVEFDS1MuIiwgIiAoMTk4NikgQUNUSVZFIE1FQVNVUkVTLCAsIFUuUy4gREVQQVJUTUVOVCBPRiBTVEFURSwgQVVHVVNUIDE5ODYiLCAiKDE5MDApIE5FVyBZT1JLIFRJTUVTLCBQLiAxNy4gLCAyMiBBUFJJTCIpCmFsbHN0YWNrZWQyIDwtIGRhdGEuZnJhbWUoVjMpCmFsbHN0YWNrZWQyJFYzIDwtIGdzdWIoIl5bWzpzcGFjZTpdXSooXFwoXFxkezR9XFwpfFxcW0FOT05ZTU9VU10sKVtbOnNwYWNlOl1dKiIsICIiLCBhbGxzdGFja2VkMiRWMykKYWxsc3RhY2tlZDIkVjMgPC0gZ3N1YigiW1s6c3BhY2U6XV0rIiwgIiAiLCBhbGxzdGFja2VkMiRWMykKYWxsc3RhY2tlZDI=
stdout
V3
1 2010, COMMUNICATION.
2 2008, END UNLAWFUL ATTACKS.
3 ACTIVE MEASURES, , U.S. DEPARTMENT OF STATE, AUGUST 1986
4 NEW YORK TIMES, P. 17. , 22 APRIL