r" data-placement="bottom" data-content="an automatic variable referring to the filename of the first dependency, in this case School_data_8-3-14.xlsx">$<</span> <span class="more" data-toggle="popover" data-placement="bottom" data-content="chaining processes: stdout of what's on the left = stdin of what's on the right">|</span>\
                        <br>&nbsp;&nbsp;&nbsp;
                        <span class="more" data-toggle="popover" data-placement="bottom" data-content="a csvkit command for taking a 