Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Key signature
Table title:
Scales with flat key signatures
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Major key </th><th colspan=1 rowspan=1 > Number of flats </th><th colspan=1 rowspan=1 > Flat notes </th><th colspan=1 rowspan=1 > Minor key </th><th colspan=1 rowspan=1 > Enharmonic equivalent </th></tr>
<tr> <td colspan=1 rowspan=1 > C major </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > A minor </td><td colspan=1 rowspan=1 > None </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > F major </td><td colspan=1 rowspan=1 > 1 </td><td class="highlighted"  colspan=1 rowspan=1 > B♭ </td><td class="highlighted"  colspan=1 rowspan=1 > D minor </td><td colspan=1 rowspan=1 > None </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > B♭ major </td><td colspan=1 rowspan=1 > 2 </td><td class="highlighted"  colspan=1 rowspan=1 > B♭, E♭ </td><td class="highlighted"  colspan=1 rowspan=1 > G minor </td><td colspan=1 rowspan=1 > None </td></tr>
<tr> <td colspan=1 rowspan=1 > E♭ major </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > B♭, E♭, A♭ </td><td colspan=1 rowspan=1 > C minor </td><td colspan=1 rowspan=1 > None </td></tr>
<tr> <td colspan=1 rowspan=1 > A♭ major </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > B♭, E♭, A♭, D♭ </td><td colspan=1 rowspan=1 > F minor </td><td colspan=1 rowspan=1 > None </td></tr>
<tr> <td colspan=1 rowspan=1 > D♭ major </td><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > B♭, E♭, A♭, D♭, G♭ </td><td colspan=1 rowspan=1 > B♭ minor </td><td colspan=1 rowspan=1 > C♯ major/A♯ minor </td></tr>
<tr> <td colspan=1 rowspan=1 > G♭ major </td><td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 > B♭, E♭, A♭, D♭, G♭, C♭ </td><td colspan=1 rowspan=1 > E♭ minor </td><td colspan=1 rowspan=1 > F♯ major/D♯ minor </td></tr>
<tr> <td colspan=1 rowspan=1 > C♭ major </td><td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > B♭, E♭, A♭, D♭, G♭, C♭, F♭ </td><td colspan=1 rowspan=1 > A♭ minor </td><td colspan=1 rowspan=1 > B major/G♯ minor </td></tr>
</table>
Question:
How many flats do the keys of F and B♭ major have?
Answer:
F major (D minor) has one flat which is on the B; then B♭ major (G minor) has two flats (on B and E).