title: How to escape brackets in SPARQL string?
body: <p>I'm trying to make a sparql query to: <code>http://sparql.lynx-project.eu/</code>
  The graph: <code>http://sparql.lynx-project.eu/graph/eurovoc</code>
  Which contains some entries with brackets in the prefLabel i.e. &quot;sanction (EU)&quot;.</p>
  <p>I'm trying to retrieve such exact match of such entries with:</p>
  <pre><code>PREFIX skos: &lt;http://www.w3.org/2004/02/skos/core#&gt;
  SELECT ?c ?label
  WHERE {
  GRAPH &lt;http://sparql.lynx-project.eu/graph/eurovoc&gt; {
  ?c a skos:Concept .
  ?c ?p ?label. 
  FILTER regex(?label, &quot;^sanction (EU)$&quot;, &quot;i&quot; )
  FILTER (lang(?label) = &quot;en&quot;)
  FILTER (?p IN (skos:prefLabel, skos:altLabel ) )
  }  
  }
  </code></pre>
  <p>It doesn't return anything. Also tried to escape the brackets with backslash but the query breaks. Do you know how to escape brackets in a sparql string?? thanks in advance!</p>