Where does allContentfulPerson, etc come from?

[unformatt]

I'm coming from there:
https://app.contentful.com/spaces/tns8ne4b11g0/onboarding/explore

It mentions

async function getPeople() {
  const entries = await client.getEntries({ content_type: 'person' })
  return entries.items
}

However, this is nowhere in the src code. The code uses this:

export const pageQuery = graphql`
  query ArbitraryNameHomeQuery {
    allContentfulBlogPost(sort: { fields: [publishDate], order: DESC }) {
      edges {
        node {
          title
          slug
          publishDate(formatString: "MMMM Do, YYYY")
          tags
          heroImage {
            sizes(maxWidth: 350, maxHeight: 196, resizingBehavior: SCALE) {
             ...GatsbyContentfulSizes_withWebp
            }
          }
          description {
            childMarkdownRemark {
              html
            }
          }
        }
      }
    }
    allContentfulPerson(filter: { id: { eq: "c15jwOBqpxqSAOy2eOO4S0m" } }) {
      edges {
        node {
          name
          shortBio {
            shortBio
          }
          title
          heroImage: image {
            sizes(
              maxWidth: 1180
              maxHeight: 480
              resizingBehavior: PAD
              background: "rgb:000000"
            ) {
              ...GatsbyContentfulSizes_withWebp
            }
          }
        }
      }
    }
  }
`

Where does allContentfulPerson come from?

[skeet]

I wasn't sure about this either but found out it's a gatsby-source-contentful convention - https://www.gatsbyjs.com/plugins/gatsby-source-contentful/#how-to-query-for-nodes