Text search within sparql point

Script

URL inputURL = null;

String sparqlPoint = "http://localhost:8892/sparql";
sparqlPoint = "http://atlas.bio2rdf.org/sparql";

//inputURL = new URL(sparqlPoint + "?default-graph-uri=&query=SELECT+DISTINCT+%3Fs+WHERE+{%3Fs+%3Fp+%3Fo+.+%3Fo+bif%3Acontains+%27"+string+"%27+.}&format=text%2Fhtml&debug=on");
inputURL = new URL(sparqlPoint + "?default-graph-uri=&query=SELECT+*+%0D%0AWHERE+{%0D%0A++%3Fs+%3Fp+%3Fo+.+%0D%0A++%3Fo+bif%3Acontains+%27" + string + "%27+.+%0D%0A++FILTER(+regex(%3Fs%2C%27" + namespace + ":%27))%0D%0A}&format=applications%2Fsparql-results%2Bxml&debug=on");

URLConnection con = inputURL.openConnection();
InputStream in = con.getInputStream();

InputStreamReader isr = new InputStreamReader(in);
Reader inReader = new BufferedReader(isr);

StringBuffer buf = new StringBuffer();
int ch;
while ((ch = inReader.read()) > -1) {
  buf.append((char)ch);
}
inReader.close();
sparql_xml = buf.toString();