Sentence:  By the action of electricity, the <WSD>water</WSD> was resolved into its two parts, oxygen and hydrogen. 
Meaning of the word marked with <WSD> tags:  (Q283) A substance (of molecular formula H₂O) found at room temperature and pressure as a clear liquid; it is present naturally as rain, and found in rivers, lakes and seas; its solid form is ice and its gaseous form is steam.