Definition
Plain language
A question you can only answer by looking up one fact and then using it to look up the next.
As stated in the literature
In multi-hop question answering (e.g., HotPotQA), a question with sequentially dependent hops where the second query can't be formed until the first is answered; resistant to parallel re-sampling, and contrasted with comparison questions whose facts are retrievable independently.
Also called: bridge questions
Why it matters: These questions test whether a system can chain facts together step by step, a harder skill than looking up a single answer.
For example, 'What is the capital of the country where the director of this film was born?' forces you to first find the director, then their birth country, then its capital.
Heard on the show
“Category C is bridge questions.”Episode 011 — When RL Actually Teaches Agents Something New, And When It Doesn't