Android SQLite execSQL problems

this is my logcat 04-26 22:46:31.940 32461-32461/com.elnaggar.blooddonation E/SQLiteLog﹕ (1) near "Request": syntax error 04-26 22:46:31.970 32461-32461/com.elnaggar.blooddonation E/AndroidRuntime﹕ FATAL EXCEPTION: main android.database.sqlite.SQLiteException: near "Request": syntax error (code 1): , while compiling: CREATE TABLE Donation Request(_id INTEGER PRIMARY KEY AUTO INCREMENT, _full_address TEXT NOT NULL, _description TEXT NOT NULL, _contact_info TEXT NOT NULL,_area TEXT NOT NULL, _blood_type TEXT NOT NULL); at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)

and this my code public void onCreate(SQLiteDatabase arg0) { arg0.execSQL("CREATE TABLE " + DATABASE_TABLE + "(" + KEY_ROW_ID + " INTEGER PRIMARY KEY AUTO INCREMENT, " + KEY_FULL_ADDRESS + " TEXT NOT NULL, " + KEY_DESCRIPTION + " TEXT NOT NULL, " + KEY_CONTACT_INFO + " TEXT NOT NULL," + KEY_AREA + " TEXT NOT NULL, " + KEY_BLOOD_TYPE + " TEXT NOT NULL);");

    }