iphone - filter data from mediawiki api ios -

i used "action=query&prop=revisions&rvprop=content&titles=%@&format=json&redirects" api getting details anil_ambani. in response got following dictionary

<i> query =     {     normalized =         (                     {             = "anil_ambani";             = "anil ambani";         }     );     pages =         {         1222313 =             {             ns = 0;             pageid = 1222313;             revisions =                 (                                     {                     "*" = "{{blp sources|date=june 2012}}\n{{infobox person\n| name                     = anil ambani \n| image            =anilambani.jpg\n| image_size       = \n| caption              = ambani in 2009\n| birth_date       = {{birth date , age|1959|6|4|df=y}}\n| birth_place      = [[mumbai]], [[maharashtra]], [[india]]\n| nationality      = indian\n| occupation       = chairman of [[anil dhirubhai ambani group]] \n| networth         = {{loss}} [[united states dollar|$]]5.2 billion (2012)<ref name=\"forbes.com\">[http://www.forbes.com/profile/anil-ambani/.] forbes.com. retrieved april 2013.</ref> \n| residence        = mumbai, maharashtra, india\n| alma_mater       = [[warwick business school]]<br />[[wharton school of university of pennsylvania|the wharton school]]\n| parents          = [[dhirubhai ambani]]<br>kokilaben ambani\n| brother          = [[mukesh ambani]]\n| spouse           = [[tina ambani]]\n| 

the value "" here nsstring. value "" is

<i>$3 = 0x0755bb50 {{blp sources|date=june 2012}} {{infobox person | name             = anil ambani  | image            =anilambani.jpg | image_size       =  | caption          = ambani in 2009 | birth_date       = {{birth date , age|1959|6|4|df=y}} | birth_place      = [[mumbai]], [[maharashtra]], [[india]] | nationality      = indian</i> 

now want filter string name, birth_date, etc. tried

<i>nsarray *arr=[htmlsrc componentsseparatedbystring:@"|"] (int i=2; i<mutarr.count; i++) {  nsarray *dictkeyvaluearray=[str componentsseparatedbystring:@"="];  [maindict setobject:[dictkeyvaluearray objectatindex:1] forkey:[dictkeyvaluearray    objectatindex:0]]; } 

but crashing after birth_date. because there "|" after birth date , age. won't key value pair after birth_date.

please suggest me other way filter string.

the response getting in dictionary form. retrieving value of key "*" string. but, string contains html value. html show content in uiwebview in our app.

now, question value of particular key i.e name, birth_date, etc.:-
html string getting not definite because changed change input word (searched word), here, input word anil ambani, , response , html value.
so, don't think there definite way values of particular key.

updated:-
substring between 2 substring, can use this:-

-(nsstring*)usescannertogetsubstring:(nsstring*)stryourstring startstring:(nsstring*)startstring  endstring:(nsstring*)endstring {     nsstring * strtest = stryourstring;     nsmutablearray *substrings = [nsmutablearray new];     nsscanner *scanner = [nsscanner scannerwithstring:strtest];     [scanner scanuptostring:startstring intostring:nil];      while(![scanner isatend]) {         nsstring *substring = nil;         [scanner scanstring:startstring intostring:nil];          if([scanner scanuptostring:endstring intostring:&substring]) {             [substrings addobject:substring];         }         [scanner scanuptostring:startstring intostring:nil];     }     if ([substrings count]>0)      {         return [substrings objectatindex:0];     }     return nil; }