title: How to check if a condition lasted for more than 15 mins?
body: <p>Below is an example of the dataset</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Date</th>
  <th>Value</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>2020-01-01 01:35</td>
  <td>50</td>
  </tr>
  <tr>
  <td>2020-01-01 01:41</td>
  <td>49</td>
  </tr>
  <tr>
  <td>2020-01-01 01:46</td>
  <td>50</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>I wish to check if the 'Value' was equal to 50 for continuous period of 15 mins. If yes, I want to extract the date for which it occurred.
  Let me give an example what I mean by continuous period of 15 mins. Assume that I want to check if the value is equal to 50 for a continuous period of 5 mins (instead of 15 mins). The data that would satisfy this condition would be as follows</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Date</th>
  <th>Value</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>2020-01-01 01:35</td>
  <td>50</td>
  </tr>
  <tr>
  <td>2020-01-01 01:36</td>
  <td>50</td>
  </tr>
  <tr>
  <td>2020-01-01 01:37</td>
  <td>50</td>
  </tr>
  <tr>
  <td>2020-01-01 01:38</td>
  <td>50</td>
  </tr>
  <tr>
  <td>2020-01-01 01:39</td>
  <td>50</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>Then I want to extract the date<code>2020-01-01</code> onto a list because the above data was equal to 50 for a continuous period of 5 mins (or more).</p>