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  my $c_first = $query->param('c_first');
  my $c_address = $query->param('c_address');
...
    }
    $sth->finish();
  }

  my $sql = "SELECT id FROM names WHERE first = ?";
  my $sth = $dbh->prepare( $sql );
...
    }
    $sth->finish();
  }

  $c_first = $dbh->quote( $c_first ); # make O'Brian safe

...
    }
    $sth->finish();
  }