You want to build a SequentialChain that first extracts keywords from text, then summarizes those keywords. Which approach correctly sets up this workflow?

hard📝 Application Q15 of 15

LangChain - Chains and LCEL

ACreate two chains: keyword_extractor outputs 'keywords'; summary_chain takes 'keywords' as input; combine with SequentialChain passing these variables

BCreate one chain that does both extraction and summary in one step

CRun keyword_extractor and summary_chain separately without chaining outputs

DUse SequentialChain but ignore passing variables between chains

Step-by-Step Solution

Solution:

Step 1: Identify the workflow steps
First extract keywords, then summarize them, so output of first is input of second.
Step 2: Use SequentialChain with proper variable passing
Set keyword_extractor to output 'keywords', summary_chain to input 'keywords', then chain them sequentially.
Final Answer:
Create two chains: keyword_extractor outputs 'keywords'; summary_chain takes 'keywords' as input; combine with SequentialChain passing these variables -> Option A
Quick Check:
SequentialChain passes outputs as inputs [OK]

Quick Trick: Chain outputs must match next chain inputs [OK]

Common Mistakes:

Trying to do both steps in one chain
Not passing outputs to next chain
Ignoring variable names in chaining

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More LangChain Quizzes

You want to build a SequentialChain that first extracts keywords from text, then summarizes those keywords. Which approach correctly sets up this workflow?

Step 1: Identify the workflow steps

Step 2: Use SequentialChain with proper variable passing

Final Answer:

Quick Check:

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