$value = explode( ' ', $value, 2 );
$value[0] = $this->getPrefixedField( $value[0] );
$prefixedValues[] = implode( ' ', $value );
$value = explode( ' ', $value, 2 );
$value[0] = $this->getPrefixedField( $value[0] );
$prefixedValues[] = implode( ' ', $value );