class="explanation_portfolio">
                    Clean labeling of groups. Use d3 v3 though.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid showBlock"
                src="img/block/block_pieChartAnimation.png"
                alt="network graph les miserables"
              />
            </a>
          </div>
          <div class="col-md-4 col-sm-6 portfolio-item">
            <a
              class="portfolio-link"
              hr