【刚学html的菜鸟提问】bootstrap栅格布局问题

Question

1.上图，容器内的栅格布局是两个col-sm-6,其中左侧一行，右侧三行。我怎么做能让左侧的一行垂直居中整个左侧栅格？ CSS不怎么熟。
2.代码:

<div class="col-sm-9 mainContent">
    <div class="row loan-group">
        <div class="col-sm-6 loan-left lead text-center">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Praesentium, expedita!</div>
        <div class="col-sm-6 loan-right">
            <p>Lorem ipsum dolor sit amet.</p>
            <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Magnam, facere.</p>
            <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Tenetur quas earum quam nihil culpa eveniet nobis perferendis totam odit expedita.</p>
        </div>
    </div>
</div>

Answer 1

垂直居中需要用到display:flex；