'Chronicling America query data with year range

From their brief API docs I can't find a way to filter the result by start/end_year. It should be year1, year2

Here is an example query I try. Changing the years, modify the result, but not as expected, there are still papers with dates outside this range.

https://chroniclingamerica.loc.gov/search/titles/results/?state=Virginia&format=json&year1=1953&year2=1954

Is it possible to filter the result with time range ?

api filter

Sources

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