Which OmniScript element can be used to retrieve data from more than one source?

 The OmniScript element that can be used to retrieve data from more than one source is Integration Procedure Action. An Integration Procedure Action can execute an Integration Procedure that can combine multiple DataRaptor actions, such as Extract, Transform, and Load, and also invoke REST or SOAP services. This way, the Integration Procedure Action can retrieve data from different sources, such as Salesforce objects or external systems, and store it in a JSON object for the OmniScript to display