At this page:
https://github.com/youngmtool/ProgrammingBlockchain/blob/master/bitcoin_transfer/spend_your_coin.md

At this sentence:
If you want to send 0.5 BTC from a transaction input with 1 BTC you actually have to spend it all!

Should the above sentence be replaced with this sentence?:
If you want to send 0.5 BTC from an output of the different transaction which holds 1 BTC, you actually have to spend it all!