It indicates that it is the input that I clicked on to find where it was used as an output. For anyone who might be curious here's the chain of transactions. If you look at any of the transactions, it's pretty obvious that the addresses listed below are just change addresses where BTC are being sent back to the same entity that is in control of 1JYvvL67LrSGCG77cy4rmpUXCFfSub4JkG.
1JYvvL67LrSGCG77cy4rmpUXCFfSub4JkG receives 0.5 BTC
which is spent sending 0.48089288 change to 19j7ygmRvMAhtugbvyb3mJUDWnctD3VKij
transID:3e441ae7adccda4833c48dad2fa995d400ffe113c429ddab1bb91581f2d84e9c
which is spent sending 0.46278997 change to 145Gn5X8pWRtjRdwaPqUhTGwmC8CA4Bdqy
transID:cf8174abeda5230c64eee096e740332671491e502dbdb4407afb508b77db3941
which is spent sending 0.44268723 change to 16BjL2ZqtDNA3Pvb2iLYp6CMkuFmCQ8bTB
transID:67b8df86c20535a6e96cab8041af1141c4b66042e410b831c63cf85b3530407a
which is spent sending 0.42208263 change to 1KzuNJ77h5nGxjaqF9LBy7kRzzQc3erMde
transID:8afe495423ed8f76c091c4a521f6fbad36858eb0c84cfb0e0ab43c7fe3f7b7ec
which is spent sending 0.40197111 change to 14REkJkCb8fJyX9e6kQwuT27yfXxMxbbDQ
transID:598cc7403264533100a3a0755ab4aa2e91d3328cb109fd9364cf6eef7274e14a
which is spent sending 0.38286358 change to 19xhdCkp3h5UVVprx7fMieWn9Vt5Ygb124
transID:89f335b89233e513c6f64b342bb77d677c180a56202b5bfd0c7a2823c3a1638d
which is spent sending 0.36175800 change to 16voEi8JG4uKNnHGoZ4Bxfhw9dbnsJf9d5
transID:255b8cf01e0b9acf1463ca36be68e2261cc0e955b7a1c3f0914e717673b35948
which is spent sending 0.34165618 change to 14M8SZf7ucDJ2Z7qSHaSXQABU5Ah5nUh8u
transID:aa49c63330ff63118c2eb7e78c448bcd5d347a3a0311d16aa4ce24aa89cc50d5
which is spent sending 0.32105180 change to 17uE5HvNCnFNYboafg2aFv4b6FDqGKWy6W
transID:05e70e34b205f12d7d14cab647b0c601a838f1aa62700e531b242dc7d8fb9a1a
which is spent sending 0.29944414 change to 1HscwZZ4FJdJq34zeeCmkGL3ZzqSbqpPd
transID:740420edcd8031ffd3c7062c96e007cc5cc7470d74ffdea0ddaa776cefa028a7
which is spent sending 0.27483628 change to 1GRYu8JZAnurBKrZoUG1akNxThckYJwYUx
transID:2c33a93d4e70849c51b7b7a3ba2b119aa12cc4ee47034bd2ca391def6e2ba938
which is spent sending 0.24773221 change to 1NxGjt7FPSkxsFehyLhfUA5rniNHtoaK2Q
transID:a306056b2ac7732e3689940f15b273589bb2c3cd1c0eff4ffdff438f983c3bed
which is spent sending 0.22161583 change to 1Jaejg82Y6SkDWzhkjWrEKb8TVw7hdDhaG
transID:c3a034c7753843bbd555b00fabdb1da400a90afea6c61bd48700391acb7f01a6
which is spent sending 0.19051416 change to 1B4QBqeU1uyQxRQHVJjhfS6amqEfRsZ2wx
transID:075ed36577ead1ac66989952b5348e482edc0ac378f7fe373b933ba3a4925f87
which is the first transaction in that chain where I see your address 1PhKfcoFJbgfPcCPYih1RtWJWdYkmE2p4K
So you are receiving those bitcoins at 1PhKfcoFJbgfPcCPYih1RtWJWdYkmE2p4K from whoever is in control of 1JYvvL67LrSGCG77cy4rmpUXCFfSub4JkG.
I guess I will never find out of Bitcoin's anonymity and all.