```js
// YourPage.js|jsx

import { useQuery, gql } from '@apollo/client';

import { PageLayout } from './PageLayout';
import { DocumentHeader } from './DocumentHeader';
import { DocumentList } from './DocumentList';

const AllInfoQuery = gql`
  query AllInfo {
    user {
      userID
      name
    }
    document {
      id
      userID
      title
      brief
      status
    }
    subdocuments {
      id
      userID
      title
      content
      status
    }
  }
`;

function useFetchInfo() {
  const { loading, error, data } = useQuery(AllInfoQuery);

  return { loading, error, data };
}

export function DocumentScreen() {
  const { loading, error, data } = useFetchInfo();

  if (loading) {
    return <p>Loading...</p>;
  }

  if (error) {
    return <p>There was an error fetching the data!</p>;
  }

  return (
    <PageLayout user={data.user}>
      <DocumentHeader document={data.document} />
      <DocumentList documents={data.subdocuments} />
    </PageLayout>
  );
}
```