grp  color    shape    subst    color_ts                shape_ts                subst_ts
---- -------- -------- -------- ----------------------- ----------------------- -----------------------
HTZ  Orange   Cone     Canvas   2014-11-19 14:22:57.633 2014-07-23 18:31:51.797 2014-01-12 04:09:15.300
KTU  Yellow   Octagon  Granite  2014-03-08 09:16:47.450 2014-01-27 03:51:11.810 2014-06-01 20:43:22.577
QXR  Pink     Ovoid    Steel    2014-08-13 05:18:21.917 2014-09-02 12:27:13.233 2014-08-21 16:52:32.067
WOR  Teal     Square   Plastic  2014-09-07 01:43:55.723 2014-03-14 22:04:23.680 2014-04-06 04:36:28.167