Refer to the input text as context and select the correct relationship between 'grocery' and 'Walmart' from the available options.
Options: operator, subsidiary, manufacturer, founded by

And what we experienced was pure-play e-commerce omnichannel as well as people that were open, such as Walmart and Target, that sell groceries, or Costco, the brick-and-mortar guys that were open, and grocery as a whole channel more than picked up from that and the demand from our products, as I mentioned.
operator