I want to set vertical middle content in div block with latest bootstrap v3.2.0.
I have Read the answer to vertical-align with bootstrap 3, but it uses float:none; in div block. 
However, I can't use float:none; in div block according to our layout.
I have this code:
<div class="container">
  <div class="col-lg-4">....</div>
  <div class="col-lg-5">....</div>
  <div class="col-lg-3">....</div>
</div>
Content Height is dynamic in block 1. I want to set vertical middle content in block 2 and 3 according to block 1 height.
This is how our layout currently looks:
       Block 1           Block 2            Block 3
 ------------------ ------------------ ------------------
|  Content Height  |      Content     |      Content     |
|        is        |------------------ ------------------
|     Dynamic      | 
 ------------------ 
if, I will use float:none; So, This is Our layout looks:
       Block 1           Block 2        
 ------------------ ------------------ 
|  Content Height  |                  |
|        is        |      Content     |
|     Dynamic      |                  |
 ------------------ ------------------ 
       Block 3
 ------------------
|      Content     |
 ------------------
This is how I would like it to look:
       Block 1           Block 2            Block 3
 ------------------ ------------------ ------------------
|  Content Height  |                  |                  |
|        is        |      Content     |      Content     |
|     Dynamic      |                  |                  |
 ------------------ ------------------ ------------------
 
     
     
     
     
     
    