[Q] Copy part of message topic

How can I copy just part of a message?

For example, I receive a text message and I just want to copy a name or just some words from that message.
When I tap and hold, there are some options like Delete, Copy text, Forward ... etc.

When I Copy text, it is copying the whole text message. But I just want to copy just part of the message.
Please let me know how I can just copy part of the message. Thanks.