fix empty timestamp list inference

shixian.shi

2023-09-06 13c2af5de44d2ac4cb09677ab4fb07f37ade2b98

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st    Street
street    Street
expy    Expressway
fwy    Freeway
hwy    Highway
dr    Drive
ct    Court
ave    Avenue
av    Avenue
cir    Circle
blvd    Boulevard
alley    Alley
way    Way
jct    Junction