def howTo():
    """Print an ENSEMBLE example query"""
    print(
        """
    example ensembl query:

    http://www.ensembl.org/biomart/
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE Query>
    <Query  virtualSchemaName = "default" formatter = "TSV"
    header = "0" uniqueRows = "0" count = "" datasetConfigVersion = "0.6" >
    <Dataset name = "hsapiens_gene_ensembl" interface = "default" >
    <Filter name = "biotype" value = "protein_coding"/>
    <Attribute name = "ensembl_gene_id" />
    <Attribute name = "ensembl_transcript_id" />
    <Attribute name = "ensembl_peptide_id" />
    <Attribute name = "cds_length" />
    </Dataset>
    </Query>
    """
        )
