Sentence:  Despite this danger , however , we are informed on every <WSD>hand</WSD> that ideas , not machines , are our finest tools ; they are priceless even though they cannot be recorded on a ledger page ; they are the most valuable of commodities - and the most salable , for their demand far exceeds supply . 
Meaning of the word marked with <WSD> tags:  a position given by its location to the side of an object