パターンのログがあります。通常とは少し違うのがラストです。
a> nc,71802265,0,"Tuesday, June 26, 2012 09:06:49 UTC",38.8335,-122.8072,1.6,0.00,21,"Northern California"
b> ci,11127314,0,"Tuesday, June 26, 2012 08:37:52 UTC",34.2870,-118.3360,2.2,10.20,100,"Greater Los Angeles area, California"
c> us,b000aqpn,6,"Tuesday, June 26, 2012 08:29:55 UTC",53.4819,-165.2794,4.4,25.60,96,"Fox Islands, Aleutian Islands, Alaska"
String regex = "^\\"[a-z,A-Z]\\s*\\(,)*[a-z,A-Z]\\"";
Pattern p = Pattern.compile(regex, Pattern.MULTILINE);
from a 必要 --- 「北カリフォルニア」 from b 必要 --- 「グレーター ロサンゼルス エリア、カリフォルニア」など
ありがとう