Now, as the schema is fixed, simple rule based techniques (Konstas and Lapata, 2013) or template based solutions could be employed.
due to the vast space of selection (which attributes to use in the summary based on the current value it takes) and generation (how to express these selected attributes in natural language) choices possible, such approaches are not scalable in terms of the number of templates as they demand hand-crafted rules for both selection and generation.