Sound analysis of ellipsis can proceed in four stages:
1. Identify the overt grammatical structure.
2. Use the context to see which relevant component or clause is unspoken.
3. Classify the evidence: reason, preceding discourse, following explanation, customary usage or commencement of action.
4. Supply the minimal necessary reconstruction and explain the rhetorical value.
For wa-sʾal al-qaryah, the implied “people” is sufficient. Inventing a full interview, several witnesses and lengthy responses would exceed the textual basis.