--* LDA_arrayify_input_epochs:
--*   attr:
--*     fillcolor: '4'
--*   desc: Shaping for model prediction.
--*   ext: sql
--*   inputs:
--*   - prep_epoch_model_input
--* 

SELECT person_id, data_partner_id, collect_list(string(concept_id)) as concept_ids
FROM prep_epoch_model_input
GROUP BY person_id, data_partner_id