Question: A cough accompanied by phlegm often causes a whitish yellowish or greenish phlegm from the chest
Please fix the punctuation.
Fixed: [A cough accompanied by phlegm often causes a whitish, yellowish, or greenish phlegm from the chest.]

Question: When using the site materials reference to the source
Please fix the punctuation.
Fixed: [When using the site materials reference to the source!]

Question: Design Vogelhuizen Kado Idee Nederland collectie 2017 Bird Feeder with hand painted and made height 74 cm width 31 cm depth 20 cm
Please fix the punctuation.
Fixed: [Design Vogelhuizen Kado Idee Nederland collectie 2017 Bird Feeder with hand painted and made (height 74 cm, width 31 cm, depth 20 cm)]

Question: Products and systems presented are subject to change without prior notice
Please fix the punctuation.
Fixed:
[Products and systems presented are subject to change without prior notice.]