tspan to add style to part of the text

tspan to add style to part of the text

<svg width="650" height="100" xmlns="http://www.w3.org/2000/svg">
  <rect width="100%" height="100%" border="black"
     style="fill:white;stroke-width:3;stroke:black" />
  <text x="30" y="60" font-size="30" text-anchor="start" stroke="red" fill="blue">
    Some text
    <tspan fill="yellow">with tspan</tspan>
    and then more text.
  </text>
</svg>