| CPC G06F 16/9535 (2019.01) [G06F 16/3322 (2019.01)] | 21 Claims |

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1. A method implemented by one or more processors, the method comprising:
determining a set of queries that are related to a first query;
determining, based on the set of queries that are related to the first query, a set of candidate filters, the set of candidate filters comprising informational terms in the set of queries that are related to the first query;
determining, for each candidate filter in the set of candidate filters, a quality score for the candidate filter, the quality score for the candidate filter being based on one or more attributes of the candidate filter in a set of resources that are determined to be responsive to the first query; and
selecting, from the set of candidate filters, based on the respective quality score for each candidate filter in the set of candidate filters, a set of query filters for the first query.
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