I have the following problem: I have a DataFrame df which looks like this: eqpid recpid queuetime trackintime trackouttime 3723
stringdist
hamlet
mdf
requirements
line-endings
surround
grouplayout
textjoin
as-if
omnifaces
partition
match-recognize
sign-in-with-apple
ordered-map
mobile-phones
w3m
managed
getpass
windows-xp-sp2
regex-replace
owned-types
screensharing
jwplayer6
cancelanimationframe
nssharingservice
marpit
temporal-difference
angular-fontawesome
android-preferences
ibm-case-manager