Does Yara regex rule support the multi-line option?

In regex, setting regex options to "multiline" means that "^" matches the start of each line and "$" matches the end of each line. But Yara rules does not seem to support it. For example, this does not work. Is there any ways to solve the issue?

rule PinenoteSolo { strings: $a= /^{"[0-9]+?.hocr.+?2Ta家$/ wide ascii

condition: $a }