You can do it in two ways:
1. If your text is static then add a fix height for p tag. Add this css:
p {
height: 220px;
display:block;
}
2. But if it can be changed or by internationalization, it can get converted to different language and gets longer/shorter than you have to set the height of p through javascript/JS after the page is loaded. But the crux is, you have to set a fixed height of `<p>`.