# Wildcard in subsampling scheme

**URL:** https://nextstrain.discourse.group/t/wildcard-in-subsampling-scheme/741
**Category:** General
**Created:** [September 22, 2021, 1:26pm UTC](https://nextstrain.discourse.group/t/wildcard-in-subsampling-scheme/741 "2021-09-22T13:26:09Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![trs](https://yyz1.discourse-cdn.com/flex031/user_avatar/nextstrain.discourse.group/trs/32/5_2.png) [@trs](https://nextstrain.discourse.group/u/trs)
#### Post date: [September 22, 2021, 5:02pm UTC](https://nextstrain.discourse.group/t/wildcard-in-subsampling-scheme/741/2 "2021-09-22T17:02:34Z")

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`--query` uses Pandas’ expression syntax, so I believe you can do this:

```auto
--query '(pango_lineage.str.startswith("AY."))'

```

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