How to use the bulma/css/bulma.css.subtitle function in bulma

const { name, title, contacts, image } = this.props
    return (
      <div>
        <div>
          <div>
            <div>
              <div>
                <div>
                  <div>
                    <figure>
                      <img src="{image}">
                    </figure>
                  </div>
                  <div>
                    <h1>{name}</h1>
                    <h3>{title}</h3>
                  </div>
                </div>
                <div>
                  <div>
                    
                  </div>
                </div>
              </div>
            </div>

          </div></div>
      </div>
    );
  }