static ALQLLine agiBlue_parseQueryLine(S s) {
  LS tok = javaTokWithBrackets(s);
  
  // TODO: improve jmatch and use here
  if (lCodeTokens(tok) == 2 && eqGet(tok, 1, "return") && isIdentifier(get(tok, 3)))
    ret ALQLReturn(tok.get(3));
    
  T3S t = agiBlue_parseTriple(tok);
  if (t != null)
    ret ALQLTriple(t);
    
  if (lCodeTokens(tok) == 2 && eqGet(tok, 1, "lock")) {
    t = agiBlue_parseTriple(tok.get(3));
    if (t == null) fail("Bad lock statement: " + s);
    ret ALQLLockStatement(t);
  }
    
  fail("Can't parse ALQL line: " + s);
}